Question

the kinetic energy of an object of mass M moving with a velocity of 5 metre per second is 25 June what will be its kinetic energy when its velocity is doubled what will be the kinetic energy win it velocity is increased three times​

Answer 1

KE = 0.5 x m x v^2

→25J = 0.5 x m x 25 = 12.5 x m

→25J / 12.5 = mass = 2kg

Thus with doubled velocity, KE = 0.5 x 2 x 100 = 100 J and tripled velocity = 0.5 x 2 x 225 = 225 J

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