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C) A force (in Newton) expressed in vector notation as F = 4î + 7j – 3k is appliedon a body and produces a displacement (in meter), D = 3 + 2j - 5k in 4seconds. Estimate the power. |
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Answer» Answer: Power = Work Done/Time Work Done(W) = FORCE X Displacement = F.s = (4i + 7j - 3k).(3I + 2j - 5k) = 12 + 14 + 15 = 41 Power = 41/4 = 10.25 |
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