The initial speed of the skier is 14 m/s.
The maximum height attained by the skier is 15 m.
Initial speed of the skier
The initial speed of the skier is determined by using the following kinematic equation.
[tex]K.E = mgh\\\\\frac{1}{2} mv^2 = mgh\\\\\frac{1}{2} v^2 = gh\\\\v^2 = 2gh\\\\v = \sqrt{2gh} \\\\v = \sqrt{2\times 9.8 \times 10} \\\\v = 14 \ m/s[/tex]
Maximum height attainedThe maximum height attained by the skier is calculated as follows;
[tex]H = \frac{v^2 sin^2\theta}{2g} \\\\H = \frac{14^2 \times (sin45)^2}{2 \times 9.8} \\\\H = 5 \ m[/tex]
Thus, the maximum height attained by the skier is (10 + 5) = 15 m.
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Controlling the amount of current in a circuit by opposing the flow of charge
is a function of which circuit component?
A. Battery
B. Transistor
C. Resistor
D. Capacitor
Answer:
Resistor provides resistance to the flow of electric current in a circuit. It controls the amount of current in a circuit by acting as a barrier to the flow of electric charges
Explanation:
A 2.5 Kg watermelon is dropped off an 8-meter balcony. What will the watermelon’s velocity be right before it hits the ground?
The watermelon’s velocity right before it hits the ground is 12.52 m/s.
Conservation of mechanical energyThe principle of conservation of mechanical energy states that the total energy of an isolated system is always conserved.
P.E = K.E
mgh = ¹/₂mv²
gh = ¹/₂v²
v = √2gh
where;
v is the velocity of the object before it hits the ground.h is the heightThe watermelon’s velocity right before it hits the ground is calculated as follows;
v = √(2 x 9.8 x 8)
v = 12.52 m/s
Learn more about conservation of mechanical energy here: https://brainly.com/question/6852965
As you look at the side of the wheel, you can see it spinning clockwise. What are the directions of the angular velocity, and angular momentum?
If the torque is applied to the rim, causing the wheel to slow down, what are the directions of the torque and the angular acceleration?
Answer:
The direction of angular velocity and angular momentum are perpendicular to the plane of rotation. Using the right hand rule, the direction of both angular velocity and angular momentum is defined as the direction in which the thumb of your right hand points when you curl your fingers in the direction of rotation.
Explanation:
Can an eagle reach exosphere through flying?
A ball which is thrown vertically upwards at 1.2 m s-
decelerates uniformly at 10 m s-2. How long will it take
to reach zero velocity?
A 0.12 s
B 2.4 s
C 6.0 s
D 12.0 S
✫ what is conservative force ?
✫ state the work - energy theorem.
thankyou ~
(a) A conservative force is a type of force where the total work done in moving a particle between two points is independent of the path taken by the particle.
(b) Work-energy theorem sates that the work done on an object is equal to the change in the kinetic energy of the object.
What is conservative force?A conservative force is a type of force where the total work done in moving a particle between two points is independent of the path taken by the particle.
The net work-done is zero, and can be mathematically expressed as follows;
ΔW = 0
What is work energy theorem?This theorem relates the change in kinetic energy to work done on object. The work-energy theorem sates that, the work done on an object is equal to the change in the kinetic energy of the object.
It can be mathematically expressed as follows;
W = ΔK.E
Where;
W is work doneΔK.E is change in kinetic energyLearn more about work-energy theorem here: https://brainly.com/question/22236101
If the same amount of heat is added to 50.0g samples of each of the metals above, which metal will experience the largest temperature change?
Match the following activities.
1.foot-pound
2.work
3.steam
4.newton meter
5.muscular force
6.force of gravity
7.force of wind
1.amount of force times the distance it moves an object
2. kind of force used to operate engines
3.English unit of measuring work equal to moving one pound one foot
4.metric measurement of work equal to moving one newton
one meter
5. kind of force that pulls things toward the center of the earth
6. force used when walking
7. force used to turn a windmill
Answer:
amount of force times the distance it moves an object: work
kind of force used to operate engines: steam
English unit of measuring work equal to moving one pound one foot: foot-pound
metric measurement of work equal to moving one Newton one meter: Newton-meter
kind of force that pulls things toward the center of the earth: force of gravity
force used when walking: muscular force
force used to turn a windmill: force of wind
Explanation:
I found the answers in quizlet
Answer:
im in the same class so here's your answer
Explanation:
Substitute equation (2) into (1) to give a new equation for p that involves only I and R
Re arrange (2) to make I the subject, and substitute your result into equation (1) to give a new equation containing only V and R
Answer:
[tex]p = {i}^{2} r[/tex]
[tex]i = \sqrt{ \frac{p}{r} } [/tex]
P= VI
V= IR
Substitute eqn 1 into eqn 2
P= (IR) I
[tex]p = {i}^{2} r[/tex]
[tex] \frac{p}{r} = \frac{ {i}^{2}r }{r} [/tex]
[tex] {i}^{2} = \frac{p}{r} [/tex]
[tex]i = \sqrt{ \frac{p}{r} } [/tex]
what is photosynthesis, food chain, evaporation and passive smokers?
Answer:
Photosynthesis: the process where plants convert light energy into sugar, for food
Food chain: a series of organisms showing which organisms eat each other
Explanation:
explain the washing effects of detergents of soap and why detergents in warm water washes greasy clothes even better
Answer:
Soaps and detergents are made from long molecules that contain a head and tail the detergent molecules also help to make the washing process more effective by reducing the surface tension of the water. Surface tension is the force which helps a blob of water on a surface hold its shape and not spread out.
Answer:
Soaps and detergents are made from long molecules that contain a head and tail. ... The detergent molecules also help to make the washing process more effective by reducing the surface tension of the water. Surface tension is the force which helps a blob of water on a surface hold its shape and not spread out.
Explanation:
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