A moving body of mass 20 kg
has 40j of kinetic energy find its speed
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kinetic E.=1/2m×v×v
40=1/2×20×v×v
40=10×v×v
v×v=4
v=2m/s
40=1/2×20×v×v
40=10×v×v
v×v=4
v=2m/s
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