1.

The tangential velocity of a body in a non-uniform circular motion varies as v = 7t^2 – 2v with the radius being equal to 21 m. What is the angular acceleration at t = 2 s in rad/s^2?(a) 4/3(b) 5/3(c) 4(d) 7/5I had been asked this question in semester exam.This is a very interesting question from Non-Uniform Circular Motion in division Laws of Motion of Physics – Class 11

Answer»

Correct CHOICE is (a) 4/3

The EXPLANATION: The angular velocity is given as, ω = v/r. HENCE, the function for angular velocity is ω = (7t^2 – 2)/21. On differentiating this expression, we will get the angular acceleration as t^2/3 On substituting, the suitable values, we will get the angular acceleration as 4/3 rad/s^2.



Discussion

No Comment Found

Related InterviewSolutions