AP Physics C Electricity & Magnetism - Energy

1

Starting from rest, a skateboarder travels down a 25o incline that's 22m long. Using conservation of energy, calculate the skateboarder's speed when he reaches the bottom. Ignore friction.

2

Starting from rest, a skateboarder travels down a 25o incline that's 22m long. Using conservation of energy, calculate the skateboarder's speed when he reaches the bottom. Ignore friction.

3

An object starts from rest and accelerates at a rate of $2.5\frac{m}{s^2}$ . If the object has a mass of 10kg, what is its kinetic energy after three seconds?

4

An object starts from rest and accelerates at a rate of $2.5\frac{m}{s^2}$ . If the object has a mass of 10kg, what is its kinetic energy after three seconds?

5

$G \approx (20/3) *10^{-11} \ \frac{m^3}{kg*s^2}, \quad M_{earth} \approx 6*10^{24}\ kg, \quad R_{earth} \approx 6000 \ km$

A man launches a 5kg ball straight up from sea level. Disregarding drag, if the man would like to launch the ball into an escape trajectory from earth's gravity, approximately how fast must he launch the ball (in meters per second)?

$G=6.67*10^{-11}\frac{m^3}{s^2kg}$

$M_E=6*10^{24}kg$

6

$G \approx (20/3) *10^{-11} \ \frac{m^3}{kg*s^2}, \quad M_{earth} \approx 6*10^{24}\ kg, \quad R_{earth} \approx 6000 \ km$

A man launches a 5kg ball straight up from sea level. Disregarding drag, if the man would like to launch the ball into an escape trajectory from earth's gravity, approximately how fast must he launch the ball (in meters per second)?

$G=6.67*10^{-11}\frac{m^3}{s^2kg}$

$M_E=6*10^{24}kg$

7

A $\small 5.0kg$ bowling ball is dropped from $\small 5.0m$ above the ground. What will its velocity be when it is $\small 1.0m$ above the ground?

8

A $\small 5.0kg$ bowling ball is dropped from $\small 5.0m$ above the ground. What will its velocity be when it is $\small 1.0m$ above the ground?

9

A 0.8kg ball is dropped from rest from a cliff that is 150m high. Use conservation of energy to find the vertical velocity of the ball right before it hits the bottom of the cliff.

10

A 0.8kg ball is dropped from rest from a cliff that is 150m high. Use conservation of energy to find the vertical velocity of the ball right before it hits the bottom of the cliff.

Energy

Practice Questions