1

JEE Main 2021 (Online) 25th February Evening Shift

Numerical

+4

-1

The initial velocity v

_{i}required to project a body vertically upward from the surface of the earth to reach a height of 10R, where R is the radius of the earth, may be described in terms of escape velocity v_{e}such that $${v_i} = \sqrt {{x \over y}} \times {v_e}$$. The value of x will be ____________.Your input ____

2

JEE Main 2020 (Online) 8th January Evening Slot

Numerical

+4

-0

An asteroid is moving directly towards the
centre of the earth. When at a distance of
10R (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 _____.

Your input ____

Questions Asked from Gravitation (Numerical)

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