Question

A solid cylinder of mass $2 kg$ and radius $4 cm$ is rotating about its axis at the rate of $3 rpm$. The torque required to stop after $2\pi$revolutions is:

• A. $2\times 10{-6}Nm$
• B. $2\times 10{-3}Nm$
• C. $12\times 10{-4}Nm$
• D. $2\times 10{6}Nm$

Answer 1

Answer: (A)

$2\times 10{-6}Nm$

Answer 2

The correct option is (A) :$2\times 10{-6}Nm$