An object of mass 100 kg is accelerated uniformly from a velocity of `5 ms^(-1)` to `8 ms^(-1)` in 6 s . Calculate the initial and final momentum of the object . Also find the the magnitude of the force exerted on the object.

Explanation

Initial velocity of the obeject u=5 m/s
Final velocity of the object v=8 m/s
Mass of the object m=100 kg
Time taken by the object to acceleration ,t=6s
Initial momentum =mu=`100 xx 5 =500 kg ms^(-1)`
Final momentum =mv=`100 xx 8 =800 kg ms^(-1)`
Force exerted on the object ,F=mv-mu/t
=m(v-u)/t=800-500
=300 /6 =50 N
initial momentum of the object is `500 kg ms^(-1)`
Final momentum of the object is `800 kg ms^(-1)`
Force exerted on the object is 50 N