Gravitation Question 120

Question: 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 [CPMT 1989; SCRA 1996; DPMT 2001]

Options:

A) mgh

B) [45mgh]

C) [56mgh]

D) [67mgh]

Show Answer

Answer:

Correct Answer: C

Solution:

[ΔU=mgh1+h/R] Substituting [R=5h] we get [ΔU=mgh1+1/5=56mgh]



NCERT Chapter Video Solution

Dual Pane