A tennis player hits a 58.0 {\rm g} tennis ball so that it goes straight up and reaches a maximum height of 7.35 {\rm m} .How much work does gravity do on the ball on the way up?

Question

anonymous · Answer

Have you read the formula work done = force . displacement ?

anonymous · Answer

The question is directly based on the formula. I  hope you'll be able to solve it. Just remember : work done by a force = force times the displacement of the object (on which the force is acting) along the direction of force.  That is, take the component of the displacement vector along the direction of force.

Or better still is to use the scalar product formula . $$W = Fd \cos \theta $$
where theta is the angle between the force and displacements vectors.