Answer:

pi = mv = 100×5 = 500kgm/s

pf = mv = 100×8 = 800kgm/s

Verified answer

Solution :

Given, an object of mass 100kg is accelerated uniformly from a velocity of 5m/s to 8m/s.

We have to find initial and final momentum of the object.

Here we have,

Mass of object, m = 100 kg

Initial velocity, u = 5 m/s

We know that, momentum of an object is equal to the product of the mass of object and velocity of object.

Now,

→ Initial momentum, p = mu

→ Initial momentum, p = 100 kg × 5 m/s

→ Initial momentum, p = 500 kgm/s

Again,

Mass of object, m = 100 kg

Final velocity, v = 8 m/s

So, final momentum, p' = mv

→ Final momentum, p' = 100 kg × 8 m/s

→ Final momentum, p' = 800 kgm/s

Therefore,

Initial and final momentum of object are 500 kgm/s and 800 kgm/s respectively.