A body of mass m rises to height h = R/5 from the earth's surface, where R is earth's radius. If g is acceleration due to gravity at earth's surface, the increase in potential energy is
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a
mgh
b
45mgh
c
56mgh
d
67mgh
answer is C.
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Detailed Solution
ΔU=mgh1+h/R Substituting R=5h we get ΔU=mgh1+1/5=mgh5+15=56mgh
A body of mass m rises to height h = R/5 from the earth's surface, where R is earth's radius. If g is acceleration due to gravity at earth's surface, the increase in potential energy is