Question

momentun of a bodychanges from 40kgm/s to -70kgm/s in 10sec.calculate the force acting on the body.​

Answer 1

$\large{\implies{Answer}}$

Using formula

Force = delta (p) / time

Force = change in momentum / time

Force = 70kgm/s - 40kgm/s /10s

Force = 30kgm/s /10s

$\large{\implies{\blue{Force=3N}}}$

Answer 2

Answer:

p1=40 kgm/s

p2= -70kgm/s

force = mv-mu/t or ma

therefore, force = p2-p1/t

=> -70-40/10

=>-74N