MCAT RT UNIFORM CIRCULAR MOTION 2022

The relation between time T and angular velocity ω is given by

• T =  ω/2π

• T =  2π/ω

• T = 2πω

• T =vω

When a body moves in a circle, the angle between its linear velocity v and the angular velocity ω is

• 90⁰

• 0⁰

• 45⁰

• 180⁰

The force needed to maintain the circular motion of a body is called

• Centripetal force

• Centrifugal force

• Coulomb force

• Gravitational force

A stone is tied at the end of a cord and is whirled from the other end in a circle at constant speed. If the cord breaks, the stone moves along

• The radius away from the center

• The radius towards from the center

• The tangent

• The direction of motion

When a stone is whirled in a vertical circle at the end of a string, the tension in the string is maximum

• At the top

• At the bottom

• At the horizontal diameter

• At the center

A car moving with a uniform speed of 2 m/s in a circle of radius 0.4 m. Its angular speed in rad/sec is

• 1.6

• 4

• 0.8

• 5

A car of mass 1 kg moves round a curve whose radius of curvature is 100 m at a speed 10 ms^-1. What is the centripetal force on the car

• 1 N

• 0.1 N

• 10 N

• 100 N

If the body moves with a constant speed in a circle

• No work is done on it

• No force acts on it

• No acceleration is produced in it

• Its velocity remains constant

A ball is thrown horizontally from the top of a cliff with a speed of 40 m/s. If it hits the ground in 2 seconds What is the distance from the cliff to the point at which the ball hits the ground?

• 19.6 m

• 20 m

• 40 m

• 80 m

The angle subtended at the center of a circle by an arc of length equal to its radius is equal to

• One rotation

• One degree

• One radian

• Half rotation