Question

A stone of mass 2kg is thrown upwards from the ground with a velocity of 3m/s. When it reaches maximum height, calculate its Kinetic Energy?

Answer 1

K.E= 1/2 mv2
=1/2 *2kg* (3m/s)2
=9J

Answer 2

The Kinetic Energy is 9 Joules.

Explanation:

Given:

Mass = m = 2 kg

Velocity = v = 3 m/s

To Find:

Kinetic Energy, K.E = ?

Solution:

Kinetic Energy:

Kinetic Energy possessed motion of an object.

The formula for Kinetic Energy is given by

$\textrm{Kinetic Energy}=\dfrac{1}{2}\times mass\times (velocity)^{2}$

Substituting the values we get

$\textrm{Kinetic Energy}=\dfrac{1}{2}\times 2\times 3^{2}=9\ Joules$

The Kinetic Energy is 9 Joules.