building is 7200 J. Find the height of the roof above the ground
nple 12. Potential energy of a suitcase of mass 24 kg whe
Solution. Here, mass of the suitcase, m = 24 kg; potential enere
the value
(PE), - (PE), = mg
A(PE) = 5 x 10 x (6 - 3)
We know that
(5oo-s) aw
70
(2) (988)
ICSE PHYSICS
PE = mgh
120
998
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