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  • 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.

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.

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If we observe the graph, the speed of the ball decreases from 80 m/s to 0 m/s in 8 seconds. We know that acceleration is the rate of change of velocity. It can be calculated as the ratio of change in velocity and time. Therefore, the acceleration will be 10 m/s2. This acceleration is caused by the force of friction. By Newton’s second law, we know that F = Ma. Mass of the ball is 50 g which will be equal to 0.05 kg. By putting the value of mass and acceleration, we will get that the friction force will be equal to 0.5 N.

 

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Gurleen Kaur

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