the kinetic energyof an object of mass m moving with a velocity of 5m/s is 25j.what will be its kinetic energy when its velocity is doubled?what will be the kinetic energy when its velocity is incresd 3 times?

the K.E(KINETIC ENERGY) of the object is 25 J.

So,

25=1/2*m*(5)²

Therefore,m=2 kg.

Now, when the velocity is doubled=2*5=10 m/s(ms^-1)

So,

K.E.=1/2*2*(10)² =100 J.

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

Therefore,K.E.=1/2*2*(15)² = 225 J.

Hope this helps...