3. A 60 g plastic ball is moving to the left at 19 m/s . How much work must be done on the ball to cause it to move to the right at 19 m/s ?
4.A 2.0 kg book is lying it on a 0.80m high table. You pick it up and place it on bookself 2.0 m above the floor.
A. During this process, how much work does gravity do on the book?
B. During this process, how much work does your hand do on the book?
Question 3. Work done on the ball is = 0 Question 4.... View the full answer