Question

A force of 100 dynes is acted on a body of mass 10g which is initially at rest, for a time interval of 3s the average impulse that acted on a body is​

Answer 1

Explanation:

Force = mass× acceleration

F =10 N

mass = 2 kg

a = F/m = 10/2 = 5 m/s²

i)now, u = 0

t = 3 sec

v = u + at = 0 + 3×5 = 15 m/s

ii) initial momentum = mu = 2×0 =0

final momentum = mv = 2×15 = 30 kg m/s

change in momentum = final momentum - initial momentum 

                                   = 30 -0 = 30 kg m/s

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Answer 2

Answer:

3.33(10^-4)

Explanation:

1dyne=10^-5