Question

The kinetic energy of an object of
H-W mass, m moving with a velocity
of 5 msis 25 J. What will be its
kinetic energy when its velocity
is doubled? What will be its
kinetic energy when its velocity
is increased three times?​

Answer 1

Answer:

225 J

Explanation:

KINETIC ENERGY of the object = 25 J.

So,

25=1/2*m*(5)

Therefore,m=2 kg.

Now, when the velocity is doubled, velocity

becomes=2*5=10 m/s(ms-7)

So,

K.E.=1/2*2*(10)2 =100 J.

Now,when the velocity is increased three times, the velocity will be=3*5=15m/s

Therefore,K.E.=1/2*2*(15)² = 225 J.