Question

an object of mass 100 kg is accelerated uniformly from a velocity of 4 metres per second to 8 metres per second in 2 seconds calculate the initial and final momentum of the object​

Answer 1

Answer:

given :

mass of the body=100kg

initial velocity =4 ms (u)

final velocity =8ms(v)

time taken =2 s(t)

now initial velocity=mu

100×4=400kgm/s

final velocity=mv

100×8=800kgm/s

Answer 2

Explanation:

Mass of object, m=100kg;

initial velocity, u=5ms −¹

; final velocity, v=8ms −¹

; time, t=6s

Initial momentum =mu=100×5=500Ns

Final momentum =mv=100×8=800Ns

Force exerted on the object,F= mv−mu/t

= 800−500/6

=300/6

=50N