PRACTICE QUIZ 11A

Answer the following questions completely and clearly.

1. Describe the changes in kinetic and potential energy over time for an object which is...

a. dropped

b. thrown downward

c. thrown upward

 2. What is the relationship between kinetic energy and potential energy at any point for an object dropped from a cliff?

 

3. State the law of conservation of energy.

 

4. What is the relationship between the work done to lift an object and its change in potential energy?

 

5. What is the relationship between the work done to accelerate an object and its change in kinetic energy?

 

Solve the following. Show all work and circle your answer. Assume there is no friction.

6. A child on a sled starts from rest and coasts down a hill 15 meters tall. If the mass of the sled and child is 52 kg, how fast will the sled be going ...

a. ...when it reaches the bottom of the hill?

 

 

 

 

b. ...when it coasts to the top of the next hill which is 5.0 meters tall.