Work, Power and EnergyHard

Question

A body of mass 10 kg at rest is acted upon simultaneously by two forces 4 N and 3N at right angles to each other. The kinetic energy of the body at the end of 10 sec is :-

Options

A.100 J
B.300 J
C.50 J
D.125 J

Solution

a = m/s2
v = u + at = 0 + 10 = 5m/s
so K.E. = 10(5) = 125N

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