JEE PHYSICS MCQ: GRAVITATION

1 Medium

1 of 1

Analyzing +4 | -1

Assertion(A): Areal velocity of a planet around sun will become two times, if mass of planet is halved.
Reason(R): Areal velocity

=\frac{L}{2 m}

, where

L

is angular momentum of planet about centre of sun.

View answer and explanation

Correct option: D

If Assertion is incorrect but Reason is correct.

Option D is correct because the areal velocity is independent of the mass of the planet, so halving the mass does not change the areal velocity. The reason is correct as it states the formula for areal velocity.

More Questions from GRAVITATION

Practice All Chapter MCQs →

The escape velocity for a body projected vertically upwards from the surface of the earth is

11.2\mathrm{\;\;km}{\mathrm{s}^{ - 1}}

. If the body is projected in a direction making an angle of

{45^0}

with the vertical, the escape velocity will be The escape velocity of a body projected from the surface of earth is

v_e

. If the body is projected at an angle

\theta

to the horizontal surface of earth, then the escape velocity would be If different planets have the same density but different radii, then the acceleration due to gravity on the surface of the planet is related to the radius (R) of the planet as Which of the following statement is absolutely correct about mass Statement I: An astronaut in a satellite feels weightlessness:

Statement II: As observed by another astronaut's in the same satellite, force of gravity and centrifugal force balance each other. An iron ball and a wooden ball of the same radius are released from a height 'h' in vacuum. The time taken by both of them to reach the ground is