Question

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? *



(a) 0.5 N

(b) 50 N

(c) 5 N

(d) 0.05 N

​

Answer 1

Answer:

We know that Acceleration a=

t

v−u

=

8−0

0−80

=−10ms

−2

Now, Force=ma

m=50g=

1000

50

kg

So, F=ma=

1000

50

×10=0.5N

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

Answer 2

Answer:

0.5N

Explanation:

it is the right answer

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