A body of mass 5kg falls freely from a height 100m.Find it's
•Potential energy
•Kinetic energy and potential energy after 3sec.
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potential energy = mgh
5kg x 10 m per sec.sq x 100m
5000 joule
kinetic and potential energy after 3 sec
1/2mv^2
1/2x 5 x 30 x30 ...by 1 eq.
2250 joule
and in potenlial energy height will decrease
so
by 3nd eq....
mgh
5 x 10 x 98.5
4925 joule
5kg x 10 m per sec.sq x 100m
5000 joule
kinetic and potential energy after 3 sec
1/2mv^2
1/2x 5 x 30 x30 ...by 1 eq.
2250 joule
and in potenlial energy height will decrease
so
by 3nd eq....
mgh
5 x 10 x 98.5
4925 joule
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