question_answer

  The velocity-time graph of a ball of mass 30 g moving along a straight line on a long table is given in the figure alongside. How much force does the table exert on the ball to bring it to rest?

Answer:

                  Here, m = 30 g = 0.03 kg From the given graph, we note that u = 20 cm/s = 0.20 m/s v = 0 t = 10 ? 0 = 10s                                                   (1/2) As we know, force exerted on the ball is given by                                          (1/2)