Exploring Simple Machines and Gears

What is the mechanical advantage of a lever if the effort arm is 4 meters long and the resistance arm is 1 meter long?

• 1

• 2

• 3

• 4

A pulley system is used to lift a 200 N weight. If the input force is 50 N, what is the mechanical advantage of the system?

• 2

• 3

• 4

• 5

Calculate the gear ratio of a compound gear train where Gear A has 20 teeth, Gear B has 40 teeth, Gear C has 10 teeth, and Gear D has 50 teeth. Gear A drives Gear B, and Gear C drives Gear D.

• 1:5

• 1:10

• 1:20

• 1:25

Which of the following is an example of a first-class lever?

• Wheelbarrow

• Scissors

• Nutcracker

• Fishing rod

If a screw has a pitch of 2 mm and is turned with a force of 10 N, what is the linear distance moved by the screw in one complete turn?

• 2 mm

• 4 mm

• 6 mm

• 8 mm