Question

velocity versus time graph of a ball of mass 50 gram rolling on a concrete floor is shown in figure below. calculate the acceleration and friction force on the floor on the ball.

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Answer 1

Answer:

Acceleration =−10ms-²

 , Force=0.5N

Explanation:

We know that Acceleration a=

v−u/t = 0−80/8−0 =−10ms-²

Now, Force=ma

m=50g= 50/1000 kg

So, F=ma= 50/1000 x 10 = 0.5N

frictional force oppose the motion, so it is taken as positive with direction opposote to velocity.