A circular disk of radius 0.015 m rotates with a constant angularspeed of 5.0 re

Question

A circular disk of radius 0.015 m rotates with a constant angularspeed of 5.0 rev/s. What is the acceleration of a point on the edgeof the disk?
A) zerom/s2
B) 15m/s2
C) 9.9m/s2

D) 0.31m/s2

E) 1.6m/s2
A circular disk of radius 0.015 m rotates with a constant angularspeed of 5.0 rev/s. What is the acceleration of a point on the edgeof the disk? A circular disk of radius 0.015 m rotates with a constant angularspeed of 5.0 rev/s. What is the acceleration of a point on the edgeof the disk? zerom/s2 15m/s2 9.9m/s2
0.31m/s2
1.6m/s2

A) zerom/s2
B) 15m/s2
C) 9.9m/s2

D) 0.31m/s2

E) 1.6m/s2

Explanation / Answer

circular disk radius r = 0.015 m    angular speed = 5.0 rev /s                             = 5 .0 * 2                             = 31.4 rad / s          acceleration = 2 r                                     =( 31.4 rad /s )2 * 0.015 m                                     =14.78 m/s2                                    = 15 m/s2

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