Simple Machines Quiz

What is a lever?

• A type of fruit

• A rigid bar that pivots on a fixed point

• A type of musical instrument

• A type of car engine

Name the three classes of levers.

• First class, second class, and third class

• Red, Green, Blue

• A, B, C

• Small, Medium, Large

How does a pulley make work easier?

• By making it more difficult to lift an object

• By increasing the amount of force needed to lift an object

• By having no effect on the amount of force needed to lift an object

• By reducing the amount of force needed to lift an object

Explain the difference between a fixed pulley and a movable pulley.

• A fixed pulley has a stationary axle, while a movable pulley has a pulley attached to the object being moved.

• A fixed pulley has a pulley attached to the object being moved, while a movable pulley has a stationary axle.

• A fixed pulley is always located at the top, while a movable pulley is always located at the bottom.

• A fixed pulley is used for lifting heavy objects, while a movable pulley is used for light objects.

Give an example of a wheel and axle in everyday life.

• Bicycle

• Car

• Train

• Truck

How does an inclined plane reduce the amount of force needed to lift an object?

• By increasing the distance over which the force is applied.

• By reducing the friction between the object and the inclined plane.

• By decreasing the distance over which the force is applied.

• By increasing the weight of the object being lifted.

What is a wedge and how is it used?

• A wedge is a type of fruit used for making smoothies.

• A wedge is a type of shoe worn by athletes.

• A wedge is a type of musical instrument used in orchestras.

• A wedge is a simple machine used to split, lift, or hold an object.

Describe how a screw is a simple machine.

• A screw is a type of wheel and axle used for transportation.

• A screw is a type of lever used to lift heavy objects.

• A screw is a type of pulley used to move objects vertically.

• A screw is a type of inclined plane wrapped around a cylinder.

Explain the difference between a regular screw and an inclined plane.

• A regular screw is flat and smooth, while an inclined plane has a spiral shape.

• A regular screw is used for drilling holes, while an inclined plane is used for lifting heavy objects.

• A regular screw is a type of inclined plane wrapped around a cylinder, which allows it to lift heavy objects with less effort.

• A regular screw is used in woodworking, while an inclined plane is used in construction.

How does a screw make work easier?

• It only works for small tasks and not for heavy lifting.

• It converts rotational motion into linear motion, allowing for the application of greater force over a longer distance.

• It converts linear motion into rotational motion, making work more difficult.

• It has no effect on making work easier.