A body is moving on a rough horizontal table in a circular path being tied to a nail by a string. While the body is in motion, match the quantities in column-I with their description in column-II. Column-I Column-II (A) Acceleration of body (P) Changes direction but constant in magnitude (B) Friction force on body (Q) Changes magnitude but constant in direction (C) Angular momentum of the particle (R) Changes direction as well as magnitude (D) Normal force by table (S) Direction as well as the magnitude is constant

Engineering

Physics

Static and Kinetic Friction

Angular Momentum and Conservation of Angular Momentum

Circular Motion in Vertical Plane

Question

A body is moving on a rough horizontal table in a circular path being tied to a nail by a string. While the body is in motion, match the quantities in column-I with their description in column-II.

Column-I	Column-II
(A) Acceleration of body	(P) Changes direction but constant in magnitude
(B) Friction force on body	(Q) Changes magnitude but constant in direction
(C) Angular momentum of the particle	(R) Changes direction as well as magnitude
(D) Normal force by table	(S) Direction as well as the magnitude is constant

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Due to friction
a_t = μg
a_r = $\frac{v^{2}}{R}$
(A) Magnitude of a_r changes so magnitude & direction both changes.
(B) Kinetic friction is constant in magnitude but direction is opposite to v.
(C) L dec. in magnitude but remains in same direction.
(D) N remain constant in magnitude & rection.