A bar pivoted on the left end with an upward force on the right end will rotate in which direction?

When analyzing the rotation of a bar that is pivoted at one end, it's essential to understand the principles of torque and the direction of applied forces. In this scenario, with an upward force applied at the right end of a bar that is pivoted at the left end, the resulting torque will cause the bar to rotate.

The bar will rotate counter-clockwise because the force is acting upward on the right end, creating a torque about the pivot point (the left end). The pivot point remains stationary, and the upward force creates a moment that causes the free end of the bar to move in a counter-clockwise direction around the pivot.

This aligns with basic physics principles; when a force is applied to one end of a lever (the bar in this case), it produces torque, which results in rotation in the direction that furthers the distance between the force and the pivot. Since the force is applied outward and upward from the pivot, the lever arm is effectively moving in the counter-clockwise direction.

Other responses do not apply as the bar will not rotate clockwise (since that would require a different direction of force), nor can it remain neutral or move upward without rotation due to the pivot. Thus, counter-clockwise is the only correct interpretation