Which simple machine would be the MOST efficient for lifting an object 30 meters off the ground?

• pulley

• screw

• wedge

• lever

A doorknob is a simple machine made up of 2 circular objects of different sizes. When turning a doorknob, what type of simple machine is being used?

• inclined plane

• wheel and axle

• wedge

• pulley

A group of workers needs to move a piano from the second floor of a building. The piano is too wide to fit through the doorway, so they will lower the piano to the ground through a window. Which simple machine would be the best to help the workers lower the piano from the window?

• wheel and axle

• inclined plane

• pulley

• wedge

The fixed point on a lever is called the __________.

• Bar

• Wedge

• Fulcrum

• Screw

A ___________ is a wheel with a rope wrapped around it that can be used to lift or PULL heavy objects by changing the direction or amount of force.

• Lever

• Wedge

• Pulley

• Inclined Plane

Which of the following are examples of inclined planes? (Hint: Two!)

• Door

• Slide

• Flag Pole

• Ramp

A __________ is a bar that moves around a fixed point in order to push, pull, or move things.

• Pulley

• Lever

• Wedge

• Screw

An __________________ is a flat surface that is raised higher at one end in order to move objects up or down.

• Lever

• Pulley

• Inclined Plane

• Wedge

Simple machines change the ___________ of a force and the _________ of force needed to do something.

• Position

• Direction

• Amount

• Speed

This image shows which of the following simple machines?

• Wheel & Axle

• Pulley

• Screw

• Inclined Plane