an object when falls from rest possess 400J of kinetic energy at the end of 2sec.calculate the mass of the object
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v=u+gt
v =0+10*2=20m/s
Substituting v=20m/s in 1/2mv²=400J, we have
m=2 kg
v =0+10*2=20m/s
Substituting v=20m/s in 1/2mv²=400J, we have
m=2 kg
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