Question

The grinding stone of a flour mill is rotating at $600rad/sec$. for this power of $1.2kwatt$ is used. The effective torque on stone in $N-m$ will be

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is B 2

Given,

$\omega =600rad/s$

$P=1.2kW=1.2\times 1000=1200W$

$\tau =?$

Power, $P=\tau \omega$

$\tau =\frac{P}{\omega }=\frac{1200}{600}$

$\tau =2Nm$

The correct option is B.