A boy and girl are running with the same speed. if the mass of the boy is 20 times that of girl find the kinectic energy

The kinetic energy of the boy is 20 times that of the kinetic energy of the girl.

Explanation:

It is given that,

The mass of the boy is 20 times that of girl.

Let and are the mases of boy and the girls.

A boy and girl are running with the same speed.

The formula for the kinetic energy is given by :

Where m is mass and v is speed

As speed is same for both boy and girl.

Kinetic energy of a girl,

...(1)

As

Kinetic energy of a boy,

From equation (1) and (2) :

So, the kinetic energy of the boy is 20 times that of the kinetic energy of the girl. Hence, this is the required solution.