Grade 5 Simple Machines

What is a lever?

• A lever is a simple machine.

• A lever is a type of bird.

• A lever is a type of vehicle.

• A lever is a type of fruit.

Name the three classes of levers.

• first-class levers, second-class levers, and third-class levers

• sixth-class levers

• fifth-class levers

• fourth-class levers

Give an example of a first-class lever.

• seesaw

• hammer

• wheelbarrow

• pulley

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

• Class 2 lever

• Class 1 lever

• Class 3 lever

• Class 4 lever

How does a second-class lever differ from a first-class lever?

• Second-class levers are always longer than first-class levers.

• The load is between the fulcrum and the effort in a second-class lever.

• Second-class levers have a different fulcrum position than first-class levers.

• The effort is between the fulcrum and the load in a second-class lever.

Provide an example of a second-class lever.

• Wheelbarrow

• Broom

• Screwdriver

• Pencil

What is the main characteristic of a third-class lever?

• The fulcrum is between the effort force and the resistance force.

• Effort force is between the fulcrum and the resistance force.

• Resistance force is between the fulcrum and the effort force.

• Third-class levers have no mechanical advantage.

Can you name a common third-class lever?

• Pair of tweezers

• Crowbar

• Door handle

• Fishing rod

Explain how levers make work easier.

• Levers have no impact on the amount of force needed to move an object.

• Levers increase the amount of force needed to move an object by decreasing the distance over which the force is applied.

• Levers work by magically moving objects without any force applied.

• Levers reduce the amount of force needed to move an object by increasing the distance over which the force is applied.

Why are levers considered simple machines?

• Levers are considered simple machines due to their ability to generate electricity.

• Levers are considered simple machines because they are only used in construction.

• Levers are considered simple machines because they are made of wood.

• Levers are considered simple machines due to their ability to amplify force and change the direction of the force applied.