Question

the kinetic energy of an object of mass meter moving with a velocity of 5 metre per second is 25 what will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity increased three times?​

Answer 1

Answer:

225 joules

Explanation:

• the kinetic energy of an object of mass meter moving with a velocity of 5 m/s = 25 joules.

As we know,

K.E = ½ * mass * Velocity².

» 25 = ½ * M * 25

» 2 = M

So, the mass is 2 .

When the velocity is doubled :

(5)2 = 10 m/s.

Kinetic energy :

= ½ * 2 * (10)2

= 1 * 100

= 100 joules.

When the velocity is increased by three times :

(5)3 = 15 m/s

Kinetic energy :

= ½ * 2 * (15)2

=225 joules.