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 the point P can be calculated using the formula V = rω, where r is the radius of the cylinder and ω is the angular velocity. 
Substituting r = 0.7 m and ω = 10 rad/s, we get V = 0.7 x 10 = 7 m/s. 
Therefore, the best choice is A) 7.0 m/s.

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

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