Q. 44.5( 2 Votes )

# A particle of mass m is observed from an inertial frame of reference and is found to move in a circle of radius r with a uniform

speed u. The centrifugal force on it is

A. towards the center

B. away from the center

C. along the tangent through the particle

D. zero.

Answer :

Centrifugal force is a pseudo force used in non-inertial frame of reference, when we want to use Newton’s laws. But here the reference frame is inertial, hence there is no centrifugal force.

Rate this question :

The displacement vector of a particle of mass m is given by r (t) = î A cos ωt + ĵ B sin ωt.

(a) Show that the trajectory is an ellipse.

(b) Show that F = −mω^{2}r

Physics - Exemplar

A motorcycle is going on an over bridge of radius R. The driver maintains a constant speed. As the motorcycle is ascending on the over bridge, the normal force on it

HC Verma - Concepts of Physics Part 1Why are mountain roads generally made winding upwards rather than going straight up?

Physics - ExemplarThe center of a wheel rolling on a plane surface moves with a speed A particle on the rim of the wheel at the same level as the center will be moving at speed

HC Verma - Concepts of Physics Part 1A body is rotating non-uniformly about a vertical axis fixed in an inertial frame. The resultant force on a particle of the body not on the axis is

HC Verma - Concepts of Physics Part 1Figure (10-Q3) shows a small wheel fixed coaxially on a bigger one of double the radius. The system rotates about the common axis. The strings supporting A and B do not slip on the wheels. If x and y be the distances travelled by A and B in the same time interval, then

HC Verma - Concepts of Physics Part 1