A ball of mass 200g falls from a heightof 5m metres what is its kinetic energy when it just reaches the ground ?(g=9.8m/ssquare
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kinitic energy of ball is 9.8 joule
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m=200g=0.2kg
h=5m
g=9.8m/s^2
when ball falls from height h=5m then according to law of conservstion of energy potentail energy at height h is same as kinatic energy when at just reavhes the surface of earth
Ep=mgh
Ek=1/2mv^2
mgh=1/2mv^2
0.2×9.8×5=Ek
Ek=9.8j
h=5m
g=9.8m/s^2
when ball falls from height h=5m then according to law of conservstion of energy potentail energy at height h is same as kinatic energy when at just reavhes the surface of earth
Ep=mgh
Ek=1/2mv^2
mgh=1/2mv^2
0.2×9.8×5=Ek
Ek=9.8j
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