Past JEE - MCQ-with Multiple Answers - Circular Motion

Circular Motion and Related Topics

1. A mass M is moving with a constant velocity parallel to the X-axis. Its angular momentum with respect to the origin:

a. is zero
b. remains constant
c. goes on increasing
d. goes on decreasing

(1985)

2. A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that:

a. its velocity is constant.
b. its acceleration is constant
c. its kinetic energy is constant
d. it moves in a circular path

(1987)

3. Imagine a light planet revolving around a very massive star in a circular orbit of radius R with a period of revolution T. If the gravitational force of attraction between the planet and the star is proportional to R^-5/2, then

a. T² is proportional to R
b. T² is proportional to R^7/2
c. T² is proportional to R^3/2
d. T² is proportional to R^3.75

(1989)