Question

A wheel of M.I. 50 kg m² starts rotating on applying a constant torque of 200 Nm. Its angular velocity after 2.5 second from the start is ______.

Options

• 1 rad/s

• 5 rad/s

• 10 rad/s

• 8 rad/s

Answer 1

A wheel of M.I. 50 kg m² starts rotating on applying a constant torque of 200 Nm. Its angular velocity after 2.5 second from the start is 10 rad/s.

Explanation:

α= `"t"/"I" = 200/50`=4 rad/s²

^{But, α= `"ω"/"t" `}

^{∴ 4= `"ω"/2.5` or ω=10rad/s}