question_answer

The magnitude of torque on a particle of mass 1 kg is 2.5 N m about the origin. If the force acting on it is 1 N, and the distance of the particle from the origin is 5 m, the angle between the force and the position vector is (in radians) [JEE Main 11-Jan-2019 Evening]

A)  \[\frac{\pi }{3}\]                       

B)       \[\frac{\pi }{8}\]

C)  \[\frac{\pi }{4}\]                       

D)       \[\frac{\pi }{6}\]

Correct Answer: D

Solution :

[d] As