Question

a force of 10N acts on a body of mass 2Kg for 3s, initially at rest. Calculate:(i) the velocity acquired by the body and (ii) the change in momentum of the body.

Answer 1

( i ) Velocity = ( ? )

We have Mass = 2 kg

Time = 3s

Force = 10 N

Force = Mass × velocity / time

10 = 2 × v / 3

v = 15 m/s.

( ii ) Change in momentum = ∆ mv

Final momentum - initial momentum

=mv – m ( 0 )

=2 ( 15 ) – 0

= 30 kg m/s.

Hope it helps!

Answer 2

Hi friend,

Please see attachment.

Initial Velocity = 0

Hope it helps........