Question

a force of 5N acts on a body for 2milli sec. calculate the impulse. if the mass of the body is body is 5g .calculate change in velocity
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Answer 1

Answer:

i) Impulse J=0.01Ns

ii) change in velocity=2m/s

Explanation:

i)

F=5N,

t=2x10^-3s,

m=5x10^-3kg

Impulse J =F.t

=5x2x10^-3

=10^-2

=0.01Ns

ii)

Change is velocity=acceleration (a) x time

a=F/m

=5/5x10^-3

=10^3

=1000m/s^2

Change in velocity = 1000x2x10^-3

= 2m/s

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