Question

an object of mass 100kg is accelerated uniformly from a velocity of 4m/s to 8m/s in 2s.calculate the initial and final momentum of the object

a)800kgm/s, 400kgm/s
b)400kgm/s, 800kgm/s
c)200kgm/s, 400kgm/s
d)400kgm/s, 200kgm/s​

Answer 1

Answer:

Correct option is (B)400 kg m/s, 800 kg m/s

Explanation:

We know that,

$\boxed{Momentum = Mass*Velocity}$

$\boxed{p = mv}$

In the given case,

Mass = m = 100kg

Initial velocity = u = 4 m/s

Final velocity = v = 8 m/s

Initial momentum = Mass * Initial velocity

p = mu

p = 100 * 4

p = 400 kg m/s

Final momentum = Mass * Final velocity

p = mv

p = 100 * 8

p = 800 kg m/s