to lift a load to the roof you apply 21 n of force to a pulley . the puley applies 21 n of force to the load what is the mechanicalo advantage of the pulley ?
1
It is just a turning block.
To determine the mechanical advantage of a pulley, you need to understand the concept of mechanical advantage. Mechanical advantage is the ratio of the output force (load) to the input force (applied force). In the case of a pulley, it is also related to the number of supporting ropes or sections that support the load.
In your scenario, it is stated that the applied force to the pulley is 21 N, and the pulley applies the same force of 21 N to the load. This suggests that there is a one-to-one correspondence between the applied force and the force applied to the load, which indicates a mechanical advantage of 1.
Therefore, the mechanical advantage of the pulley in this scenario is 1.