a 10 kilogram steel ball is dropped from the top of a tower 100 meters high the kinetic energy of the ball just before it sttikes the ground is most nearly​

Answers

Answer 1

Explanation:

If we assume negligible air resistance and heat loss, we can assume that all of the Gravitational potential energy of the ball will turn into Kinetic energy as it falls toward the ground.

Therefore our Kinetic energy = mgh = (10kg)(9.81N/kg)(100m) = 9,810J.


Related Questions

General relativity can be used to calculate what?

Answers

Answer:

Equation for general relativity

Explanation:

Mr. D's dog Gromit jumped out of a second story window (through the screen) and fell to the ground below. The window is 15 feet high, the acceleration of gravity is 9 m/s', and there are 3.28 feet in each meter. What was the final velocity of this crazed dog? (True story, don't worry he's fine and now he knows about gravity)

Answers

Answer:

Vf = 9.46 m/s

Explanation:

In order to find the final velocity of the dog we can use third equation of motion:

2gh = Vf² - Vi²

where,

g = acceleration due to gravity = 9.8 m/s²

h = height of window = (15 ft)(1 m/3.28 ft) = 4.57 m

Vf = Final Velocity of Dog = ?

Vi = Initial Velocity of Dog = 0 m/s

Therefore,

(2)(9.8 m/s²)(4.57 m) = Vf² - (0 m/s)²

Vf = √(89.572 m²/s²)

Vf = 9.46 m/s

Which best defines gravity?

A. The tendency of objects to fall from trees

B. An attractive force between two objects due to their mass

C. The amount of matter in an object

D. The rate at which objects fall to earth

Answers

Answer:

B. An attractive force between two objects due to their mass

Explanation:

Answer:

B

Explanation:

Gravity is a force that pulls 2 objects towards each other and varies depending on mass. The earth for example is large enough to have a gravitational force that keeps us down. The sun has a gravitational force that keeps the Earth in orbit.

The mass of an electron is A) equal to the mass of a proton B) less than the mass of a neutron C) greater than the mass of a proton D) equal to the mass of a neutron

Answers

Answer:

B

Explanation:

Atomic structure contains electrons, protons and neutrons.

Electron is very light compared to proton and neutrons.

Given that the mass of an electron is

A) equal to the mass of a proton

B) less than the mass of a neutron

C) greater than the mass of a proton

D) equal to the mass of a neutron

The correct answer is B which is less than the mass of the neurons.

A force of 150 kg x m/s (Newtons) acts on a 0.5kg object. What rate of acceleration will result?

Answers

Answer:

300m/s/s

Explanation:

a=f/m

f=150N

m=.5kg

150/.5=300

I need help with science​

Answers

Answer:

saaaaame

Explanation:

Your maximum heart rate is the maximum number of times your heart can contract in one minute
True or false

Answers

Answer:

True

Explanation:

It is true i am right

pls help me with this

Answers

Answer:

A screw

Explanation:

Answer:
Screw
Explanation :
I hope it helps !

A friend is coming to Tim’s house to study after school. What directions would Tim give for reaching his house from the entrance of the school?
(I WILL GIVE BRAINLIEST)

Answers

Answer:

go up the street as you exit the house and make a right and keep going up for 3 blocks and you should see the school

Which of the following is the minimum amount of work done by a hydraulic lift
to raise a 150-kg aluminum block 2.0 m vertically?

Answers

Answer: 300 J

Explanation:

Force = 150 KJ

Distance = 2.0 m

The minimum amount of work done by a hydraulic lift to raise a 150-kg aluminum block 2.0 meters vertically would be 2940 Joules, as the work done is the product of the force applied to the displacement of the object, therefore the correct answer is option B.

What is work done?

The total amount of energy transferred when a force is applied to move an object through some distance

The work done is the multiplication of applied force with displacement.

Work Done = Force × Displacement

As given in the problem we have to find out the minimum amount of work done by a hydraulic lift to raise a 150-kg aluminum block 2.0 meters vertically.

The minimum work done = 150 × 9.8 × 2

                                          = 2940 Joules

Thus, The minimum amount of work done by a hydraulic lift to raise a 150-kg aluminum block 2.0 meters vertically would be 2940 Joules.

To learn more about the work done, refer to the link given below ;

brainly.com/question/13662169

#SPJ6

Asha walks 15 m west, then 20 m north, then 15 m east. Calculate the distance and displacement
covered by Asha.(a) (Numbering problem)_​

Answers

Answer:

Asha traveled a distance of 50 m

The displacement is 20 m north.

Explanation:

Distance and Displacement

A moving object constantly travels for some distances at defined periods of time. The total moved distance is the sum of each individual distance the object traveled. It can be written as:

dtotal=d1+d2+d3+...+dn

This sum is obtained independently of the direction the object moves.

The displacement only takes into consideration the initial and final positions of the object while moving. The displacement, unlike distance, is a vectorial magnitude and can even have magnitude zero if the object starts and ends the movement at the same point.

Asha walks 15 m west, 20 m north, and 15 m east. The total distance is

dt=15 m + 20 m + 15 m = 50 m

Asha traveled a distance of 50 m

Note the final position is 20 m above the initial position since she goes 15 m west and 15 m east. Thus the displacement is 20 m north.

What measurement do we use to determine the amount of force used to move an object by a simple machine

Answers

Answer:

Newtons.

Explanation:

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

[tex] F = ma[/tex]

Where;

F represents force measured in Newton.

m represents the mass of an object measured in kilograms.

a represents acceleration measured in meter per seconds square.

Newtons is a measurement we use to determine the amount of force used to move an object by a simple machine. It is the International System of Units (SI) used to measure force and has a symbol of N.

Basically, it was named after Sir Isaac Newton based on his fundamental works in the field of mechanics (motions).

How Many displacement vectors shown in the figure above have horizontal components

Answers

Answer:

I think it's 5.

Explanation:

Answer: 4 vectors

Explanation:

I have to make three videos for physics about Newton's three laws of motion but I don't want to be in the videos or talk in them. Any ideas on how I could do that?

Answers

Answer:

You should face your fears sometimes, and get in front of a crowd do present your ideas. Not everyone is good at it, and many people get anxious when they have to speak in front of people but it’s best if you just do it and get it over with and maybe it won’t be as intimidating next time :)

(a) As you ride on a Ferris wheel, your apparent weight is different at the top and at the bottom. Explain. (b) Calculate your apparent weight at the top and bottom of a Ferris wheel, given that the radius of the wheel is 7.2 m, it completes one revolution every 28 seconds, and your mass is 55 kg.

Answers

Answer:

a. The component of the net force which make up the apparent weight are added to each other at the bottom and subtracted (the centripetal force from the weight) at the top)

b. Apparent weight at the top is approximately 519.06 N

Apparent weight at the bottom is approximately 558.94 N

Explanation:

a. The apparent weight at the top is different from the apparent weight at the bottom of a moving Ferris wheel because of the opposite direction in which the centripetal force acts at the top and the bottom, which are upwards and downwards respectively, while the weight acts downwards constantly

b. The given parameters are

The radius of the Ferris wheel, r = 7.2 m

The period for one complete revolution, t = 28 seconds

The angle covered in one revolution, θ = 2·π radian

The mass of the person riding on the Ferris wheel, the passenger  = 55 kg

Therefore, we have;

The angular speed, ω = Δθ/Δt = 2·π/(28)

From which we have;

Centripetal force, [tex]F_c[/tex] = m × ω² × r

Substituting the known values, we have [tex]F_c[/tex] = 55 kg × (2·π/(28 s))² × 7.2 m ≈ 19.94 N

The centripetal force, [tex]F_c[/tex] = 19.94 N always acting outward from the center

Weight = Mass × Acceleration due to gravity

The weight of the passenger = 55 kg × 9.8 m/s² = 539 N

The weight of the passenger = 539 N always acting downwards

At the top of the Ferris wheel the the centripetal force is acting upwards and the weight is acting downwards

Therefore;

The net force, which is the apparent weight of the passenger at the top [tex]F_{NET_{Top}}[/tex] = 539 N - 19.94 N ≈ 519.06 N

Apparent weight at the top ≈ 519.06 N

At the bottom of the Ferris wheel the weight is acting downwards and the centripetal force is also acting downwards

Therefore;

The net force at the bottom, which is the apparent weight of the passenger at the bottom [tex]F_{NET_{bottom}}[/tex] = 539 N + 19.94 N ≈ 558.94 N

Apparent weight at the bottom ≈ 558.94 N.

According to Kepler's second law of planetary motion,
O a. planets maintain constant speed around the Sun.
Ob. the area swept out by the orbit per time unit keeps changing.
O c. the speed of a planet is greatest when it is closest to the Sun.
O d. planets maintain constant acceleration around the Sun.

Answers

Answer:

c. the speed of a planet is greatest when it is closest to the Sun.

Explanation:

Johannes Kepler was an astronomer who discovered that planets had elliptical orbits in the early 1600s (between 1609 and 1619).

The three (3) laws published by Kepler include;

I. The first law of planetary motion by Kepler states that, all the planets move in elliptical orbits around the Sun at a focus.

II. According to Kepler's second law of planetary motion, the speed of a planet is greatest when it is closest to the Sun.

Thus, the nearer (closer) a planet is to the Sun, the stronger would be the gravitational pull of the sun on the planet and consequently, the faster is the speed of the planet in terms motion.

III. The square of any planetary body's orbital period (P) is directly proportional to the cube of its orbit's semi-major axis.

Answer:

A planet moves faster when it is closer to the Sun.

Explanation:

Kepler law!

can you draw it please

Answers

Answer:

Ammeters are connected in series and voltmeters are connected in parallel in a circuit


When the net force on an object is zero, what do we know about the motion of that object

Answers

Answer:

The objects speed or motion does not change if the net force is 0.

Explanation: There basically doesn't have anything acting on it so it stays put.

Calculate the kinetic energy of a 50 kg cart moving at a speed of 7.1 m/s.

ill give u 100 points if you give me the right answer.

Answers

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Brilliant Answers

A glass prism causes dispersion or deviation but glass plate doesn't.why?​

Answers

Answer:

hope this answer helps you.

A parallel circuit is shown in the diagram above. In this case the current supplied by the battery splits up, and the amount going through each resistor depends on the resistance. If the values of the three resistors are: R1 = 82, R2=82, and R3 = 42, the total resistance is found by: 1/R = 1/8+1/8+ 1/4 = 1/2. This gives R = 22. With a 10 V battery, by V = 1 R the total current in the circuit is: I = V/R = 10/2 = 5 A. The individual currents can also be found using I = V/R. The voltage across each resistor is 10 V, so the resistance across R1 : 2.5A 1.25V 2.5V 1.25A​

Answers

Answer:

Huh is there options?

Explanation:

XD I dont understand have a good day tho a better person and smarter person will answer this for u

the acceleration due to gravity of the moon is 1.67

Answers

Answer:

I think it's 1.625 m/s2

Which of the following is an example of electrical energy being changed to thermal energy?
HAIR DRYER
CAMP FIRE

Answers

Hair dryer would be an electrical energy turned to thermal

Answer:

Hair dryer

Explanation:

The electrical energy from the outlet is converted to heat to dry hair. In a fair chemical energy is converted to heat instead.

Alex wants to learn how to surf, but he is not a strong swimmer. He knows he needs to increase his ability to paddle out in order to catch the best waves. Which piece of advice would you give to help him get started on reaching his goal? He should swim at least three times a week at the community pool to build stamina. He should tread water every day to get more comfortable in the water. He should purchase the best surfboard he can afford because it will help him paddle faster. He should watch your friend who is a competitive surfer practice to learn her technique.

Answers

Answer:

He should swim at least three times a week at the community pool to build stamina.

Explanation:

explain the universal law of gravity and it's calculate from as well as the value of g​

Answers

Answer:

According to the Newton's law of gravitational every object in the universe attracts every other objects with a force which is called gravitational force.This gravitational force is (i) directly proportional to the product of their masses and (ii) inversely proportional to the square of the distance between their centres.

Explanation:

Newton's law of gravitational is called the universal law because it is applicable to all the bodies either terrestrial or celestial having any shape,size,mass or at any distance apart with any medium between them,at any time(past,present or future).

because of friction? A. energy is not always conserved
B. not all potential energy is converted to kinetic energy
C.all an object's kinetic energy turns into potential energy
D all of an object's potential energy turns into kinetic energy

Answers

Answer:

i think its B.NOT all potential energy is converted to kinetic energy

Answer:

Maybe,  B. Not all potential energy is converted to kinetic energy.

Explanation:

Even if air resistance slows down the ball, the potential energy is the same. But if air resistance is in the way, not all of the potential energy can be converted to kinetic energy. Some of the energy has to be used to push the air molecules out of the way.

The slope of a position-time graph can be used to find the moving obiects

Answers

Answer:

Is this a true and false statement?

Explanation:

the diagram shows the apparent motion of the sun across the sky?

Answers

The answer is “B” hope I helped

Answer:

The earth rotates west to east

Explanation:

Considering that the sun doesn't really move and the earth is rotating around the sun, and it is moving from east to west with us (the earth) facing it in which means the earth rotates around the sun west to east!

A loudspeaker produces a sound wave of frequency 50hz.
The amplitude of sound wave is increased.
What is heard?
A) a louder sound of higher pitch.
B) a louder sound of the same pitch.
C) a sound of higher pitch but the same loudness.
D) a sound of the same pitch and loudness as before

Answers

Answer:

B) a louder sound of the same pitch.

Explanation:

Given that the loudspeaker produces a sound wave of frequency 50hz and the amplitude of the sound wave is increased.

As loudness of the sound depends on the amplitude of the sound while pitch depends on the frequency of the sound.

On increasing the amplitude of the sound there is no effect on the frequency of the sound, so, the loudness of the sound will increase while the pitch remains unchanged.

Therefore, on increasing the amplitude of the soundwave a louder sound of the same pitch is heard.

Hence, option (B) is correct.

True or false: " The rotation of the earth and revolution of the earth mean essentially the same thing."

Answers

Answer:

FALSE

Explanation:

Rotation is spinning on its axis

Revolution is spinning around the sun

False. This is because one rotation is one day and one revolution is one year
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NEED HELP ASAP!!!! WILL MARK BRAINLIEST!!!!!Which statement best compares the rate of change of the two functions? O The rate of change of both functions is 2 O The rate of change of both functions is 3. O The rate of change of function A is greater. than the rate of change of function B. O The rate of change of function B is greater than the rate of change of function A. Which of the following is an essential amino acid? Which unit is bigger? millimetercentimetermeterkilometer Hsung Company accumulates the following data concerning a proposed capital investment: cash cost $193,872, net annual cash flows $44,200, and present value factor of cash inflows for 10 years 4.66 (rounded). (If the net present value is negative, use either a negative sign preceding the number eg -45 or parentheses eg (45).) Determine the net present value, and indicate whether the investment should be made. Help please!!? Confused Find all missing angles [x]/[6]=-46 , what is x a company dyes two sizes of rugs a small rug requires 8 hours for dyeing and a medium-sized rug requires 12 hours of dyeing the dryers have to make at least 22 guys ansld that must do it in less than 240 hours let x equal small rugs abd u equal medium rugs state a possible ordered pair solution for the system of inequalities justify mathematically using both inequalities It took Sharon 1 hour and 45 minutes to pick 3 1/2 pounds of raspberries. At what unit rate did Sharon pick raspberries?A. 1/2 pound per hourB. 1 3/4 pounds per hourC. 2 pounds per hourD. 2 1/4 pounds per hour What is the y-intercept of the graph of 4y = 2x + 8?42600N The data below gives the mean price (in cents) of a liter of regular gasoline at self-service filling stations at a sample of six urban centers in Canada in May 2011. Urban area Price/literSt. John, NL 137.1Halifax 133.6Montreal 136.2Regina 132.3Saskatoon 132.2Yellowknife 138.9Required:a. Find the sample mean (in cents). b. Find the sample standard deviation (in cents). c. Find a 90% confidence interval for the mean gasoline price per liter across urban Canada in May 2011. Provide the lower and upper limits for your confidence interval. d. Find a 95% confidence interval for the mean gasoline price per liter across urban Canada in May 2011. Provide the lower and upper limits for your confidence interval. +Write the polynomial "5a2+3a+a+1 in standard form (from greatest power tolowest): HELP I WILL GIVE BRAINLIESTWhat steps would you follow to graph the inequality statement?-4 < -wplace an open circle on 4 and shade to the leftplace a closed circle on 4 and shade to the rightplace an open circle on -4 and shade to the leftplace a closed circle on -4 and shade to the right Georges boss experienced cardiac arrest, which caused him to collapse and lose consciousness. He stopped breathing and his skin started to turn blue. What should George do next to best assist his boss?A. He should call 9-1-1 and send someone to get an AED, then perform CPR.B. He should perform CPR only.C. He should wait for someone to get him help.D. He should run to the hospital near by for help. Many scientists are concerned that the Ogallala aquifer in the United States is being depleted at an alarming rate. What would most likely be a major effect of this aquifer running dry?Many crops would die because irrigation water would be limited.The water cycle would come to a halt in the area.Farmers would have to water crops with salt water.Most people in the United States would not have drinking water. What number is 25% of 160? (worth lots of points because why not lol) help me- Question 6 of 156The rate at which work is done is called power.O A TrueO B. FalseI believe its true? The conjugate is used in _____ of complex numbers.A. quadratic B. allC. division D. either 1. What is one positive you see in the way the Community does things, in regards to seeking advice from the Giver? 2. Give one of the following after finishing Chapter 14 of The Giver: a question; a comment; a prediction; a connection. 3. Give one of the following after finishing Chapter 15 of The Giver: a question; a comment; a prediction; a connection. What is the meaning of the word mejor?O neverO couldmajorO better