Question

A wheel at rest is subjected to a uniform angular
acceleration about its axis. In the first second of its motion
it describes an angle theta,. In the second second of its motion
it describes an angle theta 2. Then the ratio of theta1/theta2 is
(a) 1:2

B 1:4
(b) 1:3
(d) 2:5​

Answer 1

★Angle revolved in 1 sec and 2 sec are θ

¹

and θ +θ

¹ ²

★ respectively.

Given: w =0 using θ= 1/2at²

¹

★ θ =1/2 a(1)²

¹

★θ +θ =1/2a(2)²

¹ ²

★Solving we get, θ =3/2a

thus θ +θ =3

¹ ²