1- The figure below shows several rotating objects and the forces applied to the

Question

1- The figure below shows several rotating objects and the forces applied to them. According to our convention for finding the sign of ?, which of these torques are positive and which are negative? (Select all the positive torques.)

ABCD

2-  Two disgruntled businessmen are trying to use a revolving door, as shown in the figure. The door has a diameter of 2.60 m. The businessman on the left exerts a force of 630 N perpendicular to the door and 1.1 m from the hub's center, while the one on the right exerts a force of 788 N perpendicular to the door and 0.666 m from the hub's center. Find the net torque on the revolving door. (Indicate the direction with the sign of your answer.)

= ? N

Explanation / Answer

1

A)negative

B)positive

C)positive

D)positive

Hence positive are B),C),D)

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