-A ball of mass 8.0 kg is suspended by two wires from a horizontal arm,which is attached to a vertical shaft,as shown in the figure.The shaft is in uniform rotation about its axis such that the linear speed of the ball equals 2.3 m/s.The tension in wire 1 is closest to:
A)39 N
B)49 N
C)29 N
D)20 N
E)9.8 N

Question

-A ball of mass 8.0 kg is suspended by two wires from a horizontal arm,which is attached to a vertical shaft,as shown in the figure.The shaft is in uniform rotation about its axis such that the linear speed of the ball equals 2.3 m/s.The tension in wire 1 is closest to:
A)39 N 
B)49 N 
C)29 N 
D)20 N 
E)9.8 N

Quizplus · Accepted Answer

The tension in wire 1 must balance the gravitational force on the ball and provide the necessary centripetal force for circular motion. Calculating these forces gives a tension closest to 39 N.

-A Ball of Mass 8