Student Login

Home›Chapters›Gravitation PYQs›Escape Velocity›Question 45

NEET 2021 · Escape Velocity

Escape Velocity question from NEET 2021

Q45NEET 2021Easy

Escape Velocity

The escape velocity from the Earth's surface is v. The escape velocity from the surface of another planet having a radius, four times that of Earth and same mass density is:

Show answer and solution

Answer: (a)

$v_e \propto R\sqrt{\rho}$
Same density, $R' = 4R \Rightarrow v' = 4v$
So the answer is (a) $4v$ .

Report a mistake

More questions on Escape Velocity

Given below are two statements: one is labelled as Assertion A and the other is labelled…JEE Main 2021 (25 Feb, Shift 1)
The radius in kilometer to which the present radius of earth (R = 6400 km) to be…JEE Main 2021 (17 Mar, Shift 1)
A particle of mass 'm' is projected with a velocity v = kVe = (k < 1) from the surface of…NEET 2021
The initial velocity vi required to project a body vertically upward from the surface of…JEE Main 2021 (25 Feb, Shift 2)
A particle of mass ' m ' is kept at rest at a height 3R from the surface of earth, where…MHT CET 2021 (21 Sep, Shift 1)
A body is projected from earth's surface with thrice the escape velocity from the surface…MHT CET 2021 (20 Sep, Shift 2)
A body is projected vertically upwards from the surface of earth with a velocity…JEE Main 2021 (22 Jul, Shift 2)
The masses and radii of the earth and moon are (M1, R1) and (M2, R2) respectively. Their…JEE Main 2021 (31 Aug, Shift 1)