The rigid body shown is rotated about an axis perpendicular to the paper and through the point P. If M = 0.40 kg, a = 30 cm, and b = 50 cm, how much work is required to take the body from rest to an angular speed of 5.0 rad/s? Neglect the mass of the connecting rods and treat the masses as particles.
A)2.9 J
B)2.6 J
C)3.1 J
D)3.4 J
E)1.6 J

Question

The rigid body shown is rotated about an axis perpendicular to the paper and through the point P. If M = 0.40 kg, a = 30 cm, and b = 50 cm, how much work is required to take the body from rest to an angular speed of 5.0 rad/s? Neglect the mass of the connecting rods and treat the masses as particles. 
A)2.9 J 
B)2.6 J 
C)3.1 J 
D)3.4 J 
E)1.6 J

Quizplus · Accepted Answer

The Answer is B

The Rigid Body Shown Is Rotated About an Axis Perpendicular