A bullet is fired vertically upwards with velocity v from the surface of a spherical planet. When it reaches its maximum height, its acceleration due to the planet ’ s gravity is 1/4th of its value at the surface of the planet. If the escape velocity from the planet is 
, then the value of N is (ignore energy loss due to atmosphere)
Text Solution
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(2)At height R from the surface of planet acceleration due to planet ’ s gravity is 
th in comparison to the value at the surface
So, 
and 
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