Bright Tutorials Bright Tutorials
ICSE Class 8 Physics Question 7 of 25

Energy — Question 8

Back to all questions
8
Question

Question 8

A body of mass 60 kg is moving with a speed 50 m s-1. Find its kinetic energy.

Answer

Given:
Mass (m) = 60 kg
Speed (v) = 50 m s-1
Kinetic energy = ?

Kinetic energy = 12\dfrac{\text{1}}{\text{2}} x mv2

= 12\dfrac{\text{1}}{\text{2}} x 60 x (50)2

= 30 x 2500

= 75000 J or 7.5 x 104 J

So kinetic energy = 7.5 x 104 J.