Question

6. Velocity versus time graph of a ball of mass 50 g rolling on a concrete floor is shown
in the figure below. What will be the frictional force of the floor on the ball?
100
Vdocky m/s
80
60
20
2
4
10
Times)
(a) 0.5 N
(b) 50 N
(C) 5N
(d) 0.05 N​

Answer 1

Answer:

0.5N

Explanation:

We know that Acceleration a=tv−u​=8−00−80​=−10ms−2

Now, Force=ma

m=50g=100050​kg

So, F=ma=100050​×10=0.5N

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

hope it is helpful

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