Posted by **mary** on Friday, April 26, 2013 at 12:10am.

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

- science -
**Abhishek (India)**, Friday, April 26, 2013 at 12:14am
Hi dear, KE = 1/2 mv^2. Hope you'll be able to do it now.

- science -
**Abhishek (India)**, Friday, April 26, 2013 at 12:18am
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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