The figure shows a cylinder of radius 0.7 m rotating about its axis at 10 rad/s.The speed of the point P is:
A)7.0 m/s
B)14$\pi$ rad/s
C)7$\pi$ rad/s
D)0.70 m/s
E)none of these

Question

The figure shows a cylinder of radius 0.7 m rotating about its axis at 10 rad/s.The speed of the point P is: 
A)7.0 m/s 
B)14$\pi$ rad/s 
C)7$\pi$ rad/s 
D)0.70 m/s 
E)none of these

Quizplus · Accepted Answer

The speed of a point on a rotating cylinder is equal to the product of the radius and the angular velocity. Therefore, the speed of point P is 0.7m x 10 rad/s = 7.0m/s. Option A is the correct answer.

The Figure Shows a Cylinder of Radius 0 π\piπ Rad/s C)7 π\piπ

The Figure Shows a Cylinder of Radius 0 $\pi$ Rad/s
C)7 $\pi$