1. A 0.05 kilogram bullet is launched with a muzzle velocity of 772.42 meters per second. It is fired from a rifle with a mass of 2.69 kilograms. What is the recoil velocity of the weapon in meters per second? Round your final answer to two decimal places.
2. A 2,522.70 kilogram truck runs into the rear of a 1,431.43 kilogram stationary car. The truck and car are locked together after the collision and move with speed 5.06 meters per second. What was the speed (in meters per second) of the truck before the collision? Round your answer to two decimal places.
3. An adult helping her child learn to ride a bike, applies a net force of 1.51 newtons to the child on the bike for 4.34 seconds. How much momentum does the child and his bike gain after being pushed by the adult in kilogram-meters per second? Round your final answer to two decimal places.
4. When a ball is hit, it travels at 24.80 meters per second. If the mass of the ball is 0.28 kilograms, what is its kinetic energy (in joules)? Round your final answer to two decimal places.
5. A 3.82 kilogram object is 171.04 meters above the ground. What is the object's potential energy (in joules) at this height? Round your final answer to two decimal places.
6. How much work ( in joules) is done in lifting a 39.10 newton box from the floor to a table that is 3.41 meters above the floor? Round your final answer to two decimal places.
7. A construction crew needs a crane to lift a weight of 4,239.12 newtons up to the top floor of a building that is 10.31 meters above the ground. The supervisor needs a crane that can do this in 53.59 seconds to do the job in the time allotted to get the construction materials to the top floor. How much power (in watts) should the crane have? Round your final answer to two decimal places.
8. A ball is thrown straight up with an initial speed of 49.76 meters per second. How high (in meters) will the ball travel up in the air?
9. A ball is at rest 38.05 meters above the ground. If it is allowed to fall under the influence of gravity only (ignore air resistance), how fast (in meters per second) is it moving just before hitting the ground? Round your final answer to two decimal places.
10. The specific heat capacity of a metal is 522.19 joules per kilogramC. How much heat energy (in joules) is needed to raise the temperature of a 15.96 kilogram piece of this metal from 5.69 C to 37.28 C. Round your final answer to two decimal places.

Please help.