Question

an object of mass 50kg is accelerated uniformly from velocity 4m/s to 8m/s in 8 seconds.calculate the initial and final momentum of object also. find magnitude of force exerted on an object.

Answer 1

initial momentum =mu
m=50kg
u=4m/s
mu=50(4)
=200kgm/s
final momentum=mv
m=50kg
v=8m/s
mv=50(8)
400kgm/s

f=ma
f=50(v-u)/t
50(8-4)/8
f=25units