An object is traveling around a circle with the radius of 5cm. If in 20sec the central angle of 1/3 radian is swept out, what is the angular speed of the object? Linear speed?(adsbygoogle = window.adsbygoogle || []).push({});

Here's how I did it. angular speed-->

a) omega=theta(in radians)/elapsed time

= π/3/20= π/3*1/20 = π/60 radians/sec. Is that the same as the answer in the book, 1/60?

linear speed-->

b) v=rw (length/radius)(omega=angular speed)

=5cm*(1/60)= 1/12 cm/s

the answer in the book is 12m/s.

what did I do wrong?

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# Homework Help: Circular motion and linear speed of an object

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