Question

the velocity time graph of an object mass 50 g is shown in figure study graph and answer
1)calculate force acting on object in time interval 0-3 seconds
2)calculate the force acting on the object in the time interval 6-10 seconds
3)Is there any time interval in which no force acts on object.Justify

Answer 1

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Answer 2

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1) acceleration = v - u/t

a = 120 - 0/3 = 40m/s

m = 50/1000 (as u have to convert g to kg)

m = 1/20

F = ma = 1/20 × 40 = 2N

2) 0×120 / 10 - 6 = -120/4 = -30m/s^2

1/20 × -30 = -1.5 N

3) velocity of the object is constant and so the acceleration is 0.

Hope it helps....!

Cheers!! :3