# A force of 10 N acts on a body of 2kg for 3 seconds.find the kinetic energy acquired by the body in 3 seconds.

2
by sreelakshmign

2015-02-28T13:05:57+05:30

### This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
You can solve the problem in different ways:
1. find work done and that is equal to KE.
2. find velocity and then power and then work done.
3. find velocity and then KE directly.
I am using the third one.
-----------------------------------------------------------------------------------------------
mass = 2kg
force = 10N
time = 3s
acceleration = F/m = 10/2 = 5m/s²
velocity = u+at = 0+5×3 = 15m/s

KE =

Thankyou very much TPS
2015-02-28T13:09:56+05:30
given that ,
mass ( m ) = 2kg
time ( t ) = 3 seconds
k.e.= ?
u = 0
a = ?
F = 10 N
﻿v = ?
F= m * a
a = F / m
a = 10 / 2
= 5 m/s
v = u +at
= 0 + 5 * 3
= 15 m/s
k.e. = 1/2mv^2
= 1/2*2*(15)^2
= 225 Joules﻿﻿
Thankyou very much