Question

The change in momentum of a body is 30 Ns. If the force acts on a body for 3s, find the
magnitude of force. State the law used to solve the numerical. ​

Answer 1

Answer:

30kg-m/s

Explanation:

Force(F)=Mass(M)×Acceleration(a)

F=10N

then,

a=F/M=10/2=5m/s^2

(1)Now,

u=0

t=3sec

v=u+at=0+3×5=15m/s

(2) Initial momentum=mu=2×0=0

Final momentum=mv=2×15=30kg-m/s

Change in momentum=

Final momentum - (minus) Inital momentum

=30-0=30kg-m/s

Answer 2

Answer:

don't know dear.......,..................