Question

A force of 100 N acts on a mass of 1 kg for 5 s. Calculate the change in momentum & the change in velocity.

Answer 1

Explanation:

we have,

F=100N

m=1Kg

t=5s

to find:

∆p(Change in momentum)=?

∆v(Change in velocity)=?

Now,

we have,

F=m*a

100 = 1(a)

a = 100 m/s²

and,

a=∆v/t (on rearranging a=d/t²)

100 = ∆v/5

∆v=500m/s

Now,

∆p= m*∆v

∆p= 1*500

∆p= 500Kgm/s

HOPE IT MAY HELP

Answer 2

Given-

Force= 100N

Mass= 1kg

Time= 5s

Solution -

=m(∆v) = f.t

=1 × ∆v= 100×5 (here ∆v refers to change in velocity)

=v = 500m/s

therefore,

Momentum is-

p=mv

p= 2×500

p=1000kg m/s

hope this will help you ☺️