Asked by mary

an object moving at a speed of 1m/s has a kinetic energy of 5 J what is its kinetic energy when it moves at 3m/s
Answered by Abhishek (India)
Hi dear, KE = 1/2 mv^2. Hope you'll be able to do it now.
Answered by Abhishek (India)
5 J = 1/2 *m*1, solving this, mass of the body is 10kg. Now, KE = 1/2 mv^2 implies 1/2 * 10 * 3^2 = 45 J
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