question_answer

  The velocity-time graph of a ball moving on the surface of floor is shown in figure. Calculate the force acting on the ball if mass of the ball is 100 g.

Answer:

                    The velocity time graph shows that the velocity of the ball at t = 0 is zero. Initial velocity of ball, u = 0. Velocity of ball at t = 4 s is 20 That is, final velocity, u = 20 Time,             t = 4 s Acceleration of the ball,  or                  (1) Also, mass of ball, Force acting on the ball, F= ma or