Question

fill in the blank.

1. the ______________________________ permits one man to lift very heavy objects.
2. give two uses of a cam. ______________________________
3. the ______________________ allows the rotary motion of a shaft to make a bend.
4. the _____________ is a rotating inclined plane.

Explanation:

Question 1

A lever is a simple machine that can amplify force, allowing one person to lift heavy objects by using the principle of mechanical advantage (fulcrum, effort arm, load arm).

Cams are used in engines (e.g., internal combustion engines) to open and close valves at the correct timing, controlling the intake and exhaust of gases. They are also used in mechanical systems like printing presses to control the movement of parts (e.g., moving a roller or a plate in a timed manner) for operations like ink transfer or paper feeding.

A universal joint (or U - joint) is a mechanical component that can transmit rotary motion between two shafts that are at an angle (have a bend) to each other. It is commonly used in vehicles to transmit power from the transmission to the drive axle when the axle and transmission are not in a straight line.

Answer:

lever

Question 2