Question

Velocity versus time graph of a ball of mass 50 g rolling on a concrete floor is shown in Fig. 9.1. Calculate the acceleration and frictional force of the floor on the ball. 

Answer 1

Acceleration = a = v -u / t = - 80 / 8 ms^-2 =  —10ms⁻²

Force = m a = 50 /1000x10= 0.5N