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  4. A particle of mass m is projected vertically upwards. A uniform gravitational field vecg is acted vertically downwards. The most appropriate graph between magnitude of potential energy U and height h(<< radius of earth) is (assume U to be zero on surface of earth) :

Q. A particle of mass is projected vertically upwards. A uniform gravitational field is acted vertically downwards. The most appropriate graph between magnitude of potential energy and height radius of earth) is (assume to be zero on surface of earth) :

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Solution:

Above the surface of earth for small altitudes gravitational potential varies linearly with height hence option (A) is correct.

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