Question

A body of mass 20kg is moving with
15m/s velocity after the application of
certain force the body stopes after moving
through l0 m. Find out the amount
of the applied force​

Answer 1

Explanation:

Given that:

Mass =20 kg

Velocity =15m/s^2

Distance S =10 m

To find : Force

Solution :

S= vt

10 =15×t

t =10/15

=2/3 sec

Force = ma

=m × v/t

= 20×15×3/2

=10×15×3 =450 N ANS.

Answer 2

Since we needed to find force=?

So force=mass x acceleration .......(a)

where

mass =20kg

acceleration= change in velocity / time........... (1)

Time=distance / speed=10/15=2/3 sec .......(2)

putting values of 2 in 1

acceleration=15/2/3=45/2

putting values of acceleration and mass in equation ( a)

$force = 20 \times \frac{45}{2} \\ = 450 newton$