A ball rolls across the ground and slows to a stop. Does gravity do work in stopping the ball?
Explain.
(Drawing a picture will help.)

gravity does help the ball since gravity pulls down objects, it causes more friction on the ball therefore causing the ball to slow down faster.

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card

a.   mass number from atomic number