Question

(figure 1) shows a uniform 2.0 kg rod that can pivot in a vertical plane on an axle. we want to find the net torque about the axle. Part A

How many forces act on the rod?

a. 2 b. 3 c. 4 d. 5

Part B Complete previous part(s) Part C Complete previous part(s)

Part D Complete previous part(s)

Answer 1

There are 2 forces act on the rod.

Therefore, correct answer is a. 2 forces act on the rod.

Step-by-step explanation:

For a uniform rod in a vertical plane, only two forces act on it: the weight acting vertically downward at the center of mass and the pivot force exerted by the axle. These are the only forces influencing the net torque. Other forces, like those that might be present at the ends of the rod, would not contribute to the net torque about the axle since they act at the axis of rotation.

The principles of rotational motion and torque in physics. Understanding the forces and torques acting on an object is fundamental to solving problems related to equilibrium and rotational dynamics.

Therefore, correct answer is a. 2 forces act on the rod.