Question

A force of 0.03 N acts on a mass of 0.4 kg for 10 second . find the velocity and momentum of body after 10s
​

Answer 1

Explanation:

F=0.03

m=.4 kg

we know that

F=m×a

0.03=.4×a

a=.03/.4

=7•5

here u is zero

V=u+at

V=0+7•5×10

V=75m/s

hence momentum after ten seconds

P=mv

P=.4×75

P=30kg m/s

Answer 2

Explanation:

F=0.03N

M=0.4kg

we know that

F=m×a

0.03=0.4×a

a=0.03/0.4

=0.075

here u=0

apply the kinematics equation

v=u+at

v=0+0.075×10

v=0.75m/s

momentum after 10 second

p=mv

p=0.4×0.75

p=0.3 kg.m/s