Question

Propeller blades in aeroplane are $2$m long. When propeller is rotating at $1800$ rev/min, compute the tangential velocity of tip of the blade.

Answer 1

$\omega =\frac{2\pi n}{60}=\frac{2\times \pi \times 1800}{60}=60\pi =60\times 3.14=188.4rad$

$v=r\omega =2\times 188.4=376.8m/s$