Home › CBSE Class 11 (Science) › Physics › Rotational Motion › A free particle moves in a straight line at cons…
A free particle moves in a straight line at constant velocity. Its angular momentum about a fixed point
Astays constant
Bdecreases with time
Cchanges direction
Dincreases with time
Answer & Solution
Correct answer: A. stays constant
Both mv and the perpendicular distance of the line from the point stay fixed, and so does the direction, so l is conserved.
Related questions
Which property is shared by both the scalar and the vector product?Moment of force and angular momentum are both defined asA wheel turns through angle Δθ in time Δt. Its average angular velocity isThe moment of inertia of a composite rigid system about an axis isMoment of inertia about an axis equals the ratio of the applied torque to the resultingTwo small masses m are fixed at the ends of a light rod of length l. I about a perpendiculThe total torque on a system does not depend on the chosen origin when the total externalA rigid body fixed at one point or along a line can have