The two small spheres each have a mass of 3 kg are attached to the rod of negligible mass. A torque $M = (8 t) Nm$ , where t is in seconds, is applied to the rod. The time at which each sphere attains a speed of 3 m/s starting from rest is

Question

CT43 m5 diagram

TestHub · Accepted Answer

The two 3 kg masses at 1 m give I=6 kg m². Angular impulse ∫0ᵗ8t dt=4t² equals Iω. For rim speed 3 m/s, ω=3 rad/s. Thus 4t²=18, so t=3/√2 s=1.5√2 s.

Physics - Rotation Question with Solution | TestHub

Options:

Doubts & Discussion