Question

A toy of mass 0.1 kg acquires a speed of 5 m per second when pushed forward. What is the impulse given to the toy?

Answer 1

Answer:

0.5 Ns

Explanation:

Given:

m=0.1 kg

u=0 m/s

v=5m/s

Solution:

Impulse is the force acting on a body over an interval of time.

we know that

I=FΔT

where

I=impulse

F=force

ΔT=change in time

We also have the formula

FΔT=Δp

where

Δp=change in momentum

Therefore from the above two formulas we get

I=Δp

=pf - pi

where

pi=initial momentum

pf=final momentum

• pi=m*u

           =0

• pf=m*v

           =0.1*5

           =0.5 kg m/s

Plugging in the values

I=pf - pi

=0.5 - 0

=0.5 N s

Hope this helps.