CBSE Class 11-science Answered
A force of 2i+3j+2kN acts on a body for 4s and produces a displacement of 3i+4j+5k m. calcuate power.
Asked by vikasrajouriya | 22 Aug, 2020, 09:34: AM
Expert Answer
Work done = F.s = (2i+3j+2k).(3i+4j+5k) = 2.3 + 3.4+2.5 = 6+12+10=28 J
Power = Energy/time
Energy = Work done
Thus,
Power = 28/4 = 7 W
Answered by Shiwani Sawant | 23 Aug, 2020, 12:05: AM
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