c) A force (in Newton) expressed in vector notation as F = 4î + 7j – 3k is applied
on a body and produces a displacement (in meter), D = 3 + 2j - 5k in 4
seconds. Estimate the power.
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Answer:
Explanation:
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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