We need to know some quick formula relating to our problem.

The distance covered around a circle is circumference given by:

$\overline{){\mathbf{Distance}}{\mathbf{=}}{\mathbf{2}}{\mathbf{\pi r}}}$, where r is the radius.

Speed,

$\overline{){\mathbf{v}}{\mathbf{=}}{\mathbf{r}}{\mathbf{\omega}}}$, where ω is the angular velocity.

Centripetal acceleration:

$\overline{){{\mathbf{a}}}_{{\mathbf{c}}}{\mathbf{=}}\frac{{\mathbf{v}}^{\mathbf{2}}}{\mathbf{r}}{\mathbf{=}}{\mathbf{r}}{{\mathbf{\omega}}}^{{\mathbf{2}}}}$

Time period, T:

$\overline{){\mathbf{T}}{\mathbf{=}}\frac{\mathbf{D}\mathbf{i}\mathbf{s}\mathbf{t}\mathbf{a}\mathbf{n}\mathbf{c}\mathbf{e}}{\mathbf{v}}}$

A rotating fan completes 1200 revolutions every minute. Consider a point on the tip of a blade, at a radius of 0.14 m.

(a) Through what distance does the point move in one revolution?

(b) What is the speed of the point?

(c) What is the magnitude of its acceleration?

(d) What is the period of the motion?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Circular Motion concept. You can view video lessons to learn Circular Motion. Or if you need more Circular Motion practice, you can also practice Circular Motion practice problems.