B2-23
Demonstrate that equilibrium of forces is an insufficient condition for static equilibrium
The weight of the rod is balanced, with the rod held in a horizontal position, using two equal weights hung over pulleys. While holding the rod fixed, move a small weight from one side to the other. The force condition for equilibrium is still met, but the torque condition is not the same, and the rod will rotate.
B2, OS0, ME1