On Mars, the acceleration due to gravity is 8 m/s/s. If an object ...

[mwit1967]

On Mars, the acceleration due to gravity is 8 m/s/s. If an object is dropped over the surface of Mars, how fast will it be moving at the end of 3 seconds of fall?
 
  A) 32 m/s B) 72 m/s C) 16 m/s D) 24 m/s E) 8 m/s

Question 2

Work is done on an object when you lift it against gravity. How does this work relate to gravitational potential energy? If the lifted object is dropped, what becomes of this energy?
 
  What will be an ideal response?

[missalyssa26]

Answer to Question 1

D

Answer to Question 2

Answer: The work you do on the lifted object may be stored as gravitational potential energy. Then force  distance = weight  height. If the lifted object is dropped, this energy transforms to motion energykinetic energy. The kinetic energy it possesses as it returns to its initial position equals the gravitational potential energy at its highest point, which equals the initial work done.

[mwit1967]

TY

[missalyssa26]

You're welcome