Engineering Board Exam Reviewer · Angles and Trigonometric Functions · medium

A wheel 40 cm in diameter rotates at 300 rpm. Find the linear speed of a point on its rim in m/s.

1. 4 π 12.57
2. 2 π 6.28
3. 60
4. π 3.14

Answer

B. 2 π 6.28

Solution

=300·2π/60=10π rad/s and r=0.20 m, so v=r =0.20(10π)=2π 6.28 m/s.

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