JEE Main & Advanced Physics Gravitation / गुरुत्वाकर्षण Question Bank Critical Thinking

  • question_answer
    A body of mass m is taken from earth surface to the height h equal to radius of earth, the increase in potential energy will be               [NCERT 1971; CPMT 1971, 97; IIT 1983; CBSE PMT 1991; Kurukshetra CEE 1996;      CMEET Bihar 1995; MNR 1998; AIEEE 2004]

    A) mgR    

    B)             \[\frac{1}{2}mgR\]

    C)             2 mgR

    D)                      \[\frac{1}{4}mgR\]

    Correct Answer: B

    Solution :

                    \[\Delta U=\frac{mgh}{1+\frac{h}{R}}=\frac{1}{2}mgR\,\,(\because \,\,\,h=R)\]


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