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JEE Main Physics Class 11 Gravitation Part 1 Questions

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Question : 36

Total: 100

An asteroid is moving directly towards the centre of the earth. When at a distance of 10 R (R is the radius of the earth) from the earths centre, it has a speed of 12 km/s.
Neglecting the effect of earths atmosphere, what will be the speed of the asteroid when it hits the surface of the earth (escape velocity from the earth is 11.2 km/ s)? Give your answer to the nearest integer in kilometer/s _____.

[NA 8 Jan. 2020 II]

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