Question

(b) How did the resistance force relate to the effort force for the fixed pulley alone? How did the resistance force relate to the effort force when you added a movable pulley to the fixed pulley? How does the mechanical advantage compare with the slope of the line for each pulley? Explain using your data.

Answer 1

Step-by-step explanation:

The mechanical advantage is defined as the ratio of the resistance force or load force to the effort force.

For the fixed pulley, the resistance force is equal to the effort force. The mechanical advantage will be one in this case.

Therefore, in case of fixed pulley, the distance of rope needed to lift the load is equal to the distance needed to raise the load.

When you add a movable pulley to the fixed pulley then the mechanical advantage is 1.8. In this case, the resistance force is twice the effort force.

In this case, the additional amount of the rope is slightly more than twice distance desired to be raised.

The mechanical advantage is independent in the case of the slope of the line for each pulley.

Answer 2

For the fixed pulley alone, when the effort force is suddenly increased, the resistance force also increases. This is due to the friction produced by effort force on the pulley. When a movable pulley is used, the effort force is reduced compared to the same effort force done on a fixed pulley.