Simple Machine_4

In a third-class lever, where is the load positioned?

• a) At the center

• b) At one end

• c) Between the load and effort

• d) At the other end

What characterizes a third-class lever?

• a) Effort at one side, fulcrum at the other side, and load at the center

• b) Fulcrum at the center

• c) Effort at the center

• d) Fulcrum at one end

Which of the following would typically require more force to operate efficiently?

• a) Third-class lever

• b) First-class lever

• c) Second-class lever

• d) Fourth-class lever

How does a screw function as a simple machine?

• a) By rotating

• b) By sliding

• c) By compressing

• d) By rolling

What distinguishes a screw from a nail?

• a) Length

• b) Thickness

• c) Grooves

• d) Material

What is the primary purpose of the grooves on a screw?

• a) To increase weight

• b) To reduce friction

• c) To enhance grip

• d) To improve aesthetics

What kind of simple machine is a screw?

• a) Lever

• b) Pulley

• c) Inclined plane

• d) Wheel and axle

How does a screw function as an inclined plane?

• a) By rotating around its axis

• b) By moving along its length

• c) By wrapping around a shaft

• d) By converting rotational motion into linear motion

Why does it take less force to turn a screw?

• a) Because a screw has grooves

• b) Because a screw is made of metal

• c) Because a screw moves a longer distance

• d) Because a screw has a pointed tip

Which of the following is an example of a screw?

• a) Hammer

• b) Pencil

• c) Corkscrew

• d) Tape measure