JEE Advanced 2015 Physics question
A bullet is fired vertically upwards with velocity from the surface of a spherical planet. When it reaches its maximum height, its acceleration due to the planet's gravity is of its value at the surface of the planet. If the escape velocity from the planet is , then the value of is (ignore energy loss due to atmosphere)
Answer: 2
Solution
, so means the bullet is at from the centre (height ). Energy conservation between the surface and the top point (speed
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