Lesson: Rotational EquilibriumPhysics
In this lesson, we will learn how to calculate the positions and masses of objects in rotational systems such that the net rotational acceleration is zero.
Sample Question Videos
A uniform seesaw is balanced on a fulcrum located 3.0 m from the left end, as shown. The smaller boy on the right has a mass of 40 kg and the bigger boy on the left has a mass of 80 kg. What is the mass of the board?
The uniform seesaw is balanced at its center of mass, as shown. The smaller boy on the right has a mass of 40 kg. What is the mass of his friend?
A uniform scaffold with of weight 40.0 kg and length 6.0 m is supported by two light cables, as shown in the figure. A painter weighing 80.0 kg stands 1.0 m from the left end of the scaffold, and his painting equipment is 1.5 m from the right end. The tension in the left cable is twice that in the right cable.
Find the tension in the right cable.
Find the tension in the left cable.
Find the mass of the equipment.