Unit14: Simple Machines

Which of the following statements is true about simple machines?

• They make our work more complex and difficult.

• They are only used in industrial settings.

• They reduce effort or change the direction of applied force.

• They are not useful in day-to-day life.

Which of the following is NOT one of the six types of simple machines?

• Lever

• Pulley

• Gear

• Inclined plane

What type of simple machine is show in the picture?

• lever

• wheel and axle

• pulley

• screw

What is the purpose of an inclined plane?

• To change the direction of the force

• To multiply the output force

• To reduce effort

• To move heavy objects to a higher level

How does a pulley make work easier?

• By amplifying the force applied

• By reducing the effort required

• By changing the direction of the force

• By increasing the speed of work

What is the primary function of a wheel and axle?

• To hold things together

• To move heavy objects

• To multiply the output force

• To cut materials

Which simple machine is formed by wrapping an inclined plane onto a rod?

• Screw

• Wedge

• Lever

• Pulley

What are the three main components of a lever?

• Effort, load, and fulcrum

• Wheel, axle, and load

• Inclined plane, wedge, and fulcrum

• Pulley, screw, and load

In which class of levers is the fulcrum placed between the load and the effort?

• Class I

• Class II

• Class III

• Class IV

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

• See-saw

• Scissors

• Broom

• Wheelbarrow