Simple Machines

What is the primary function of a simple machine?

• To change the amount of work done

• To make it easier to perform work

• To create energy

• To reduce the number of machines needed

Do simple machines change the total amount of work done?

• Yes, they increase the total amount of work done

• Yes, they decrease the total amount of work done

• No, they only change the direction of force

• No, they do not change the amount of work done

How many types of simple machines are there?

• Four

• Five

• Six

• Seven

What is the purpose of an inclined plane?

• To make it more difficult to move objects.

• To change the direction of an object's movement.

• To make it easier to raise or lower an object.

• To measure the weight of an object.

What is the purpose of a wedge?

• To make it more difficult to move objects.

• To change the direction of an object's movement.

• To make it easier to raise or lower an object.

• To split objects

Match the following simple machine to their definition

• Lever

• A board or bar that sits on a fixed point called a fulcrum. The pivots or moves on the fulcrum

• Wheel and Axle

• A simple machine that consists of a wheel attatched to a rod. Also used to life or move objects

• Inclined Plane

• A board or other flat surface that is set at an angle to a surface.

• Screw

• an inclined plane wrapped around a flat, middle object. This creates twists or threads.

• Wedge

• Looks like two inclined planes placed back-to-back. The sides of the machine come to a point so that the machine can be driven into an object.

What does a screw create when wrapped around a flat, middle object?

• Joints

• Holes

• Threads

• Nails

Which of the following is NOT an example of an object similar to a screw?

• Jar lid

• Bottle opener

• Nail

• Hammer

What is a wheel and axle?

• A type of vehicle

• A simple machine that consists of a wheel attached to a rod

• A component found only in bicycles

• A tool used for steering

What is the primary use of a wheel and axle?

• To measure distances

• To increase speed

• To lift or move objects

• To store energy