4. A small dog is trained to jump straight up a distance of 1.2 m. How much kinetic energy does the 7.2-kg dog need to jump this high? (The acceleration due to gravity is 9.8 m/s².)

85 J
18.2 J
9.8 m/s
There is not enough information.

Question

4.   A small dog is trained to jump straight up a distance of 1.2 m. How much kinetic energy does the 7.2-kg dog need to jump this high? (The acceleration due to gravity is 9.8 m/s².)  

85 J
18.2 J
9.8 m/s
There is not enough information.

anonymous · Answer

The energy required to move some distance while experiencing a force is equal to the force times the distance. 
Force is equal to mass time acceleration.

anonymous · Answer

85 j is the answer the formula is 7.2 * 9.8 * 1.2 = 84.67200

batman31 · Answer

sorry to reawaken a dead thread, but I gotta thank @fosterthepeople for actually explaining this, it helped with a similiar problem, except the values were changed.