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A body of mass 2 kg begins to move under the action of a time dependent force given by F G = (6t i ˆ + 6t 2 j ˆ )N. The power developed by the force at the time t is given by

1. (9t 3 + 6t 5 )W
2. (3t 3 + 6t 5 )W
3. (6t 4 + 9t 5 )W
4. (9t 5 + 6t 3 )W

Correct answer: (9t 3 + 6t 5 )W

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