Work, Power and EnergyMedium
Question
A stone is projected vertically upto reach maximum height h. The ratio of its KE to its potential energy at a height (4/5) h, will be:-
Options
A.5 : 4
B.4 : 5
C.1 : 4
D.4 : 1
Solution
At a height 
,the potential energy = mg × 
Total energy = mgh
∴ KE at that height = mgh -
mgh
=
mgh
Ratio of Ke and PE =mgh/
mgh 1: 4
,the potential energy = mg × Total energy = mgh
∴ KE at that height = mgh -
mgh=
mghRatio of Ke and PE =
mgh/ mgh 1: 4Create a free account to view solution
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