Question

calculate the k.E of a body of mass 50 kg moving with a velocity of 50cm/s

Answer 1

K.E.=1/2 ×m ×v²
.here v= 50/100=0.5 m/s

then k.e. = 50 ×0.5/2=12.25 N

Answer 2

K.E. = 1/2×M×V^2
K.E. = 1/2×50×0.5×0.5
K.E. = 25×0.25
K.E. = 6.25