One of the following machines always magnifies force.Question 6Answera.1st class leverb.Wheel and axlec.2nd class leverd.3rd class lever

To determine which machine always magnifies force among the options provided, we need to analyze the different classes of levers and the function of a wheel and axle.

1. 1st Class Lever: In this arrangement, the load and effort are on opposite sides of the fulcrum. Depending on the positioning of the load and effort, it can either magnify force or increase distance.

2. 2nd Class Lever: Here, the load is between the fulcrum and the effort. This configuration always magnifies force because the effort arm is longer than the load arm.

3. 3rd Class Lever: In this system, the effort is between the fulcrum and the load. It does not magnify force; instead, it allows for greater speed and distance movement of the load.

4. Wheel and Axle: This machine can magnify force depending on the radius of the wheel compared to the axle.

Final Answer

The machine that always magnifies force is c. 2nd class lever.