Simple Machines

Which is not a type of simple machine?

• spring

• screw

• pulley

• wedge

If you use a crowbar to get the lid off of a bucket, what simple machine are you using?

• inclined plane

• pulley

• wheel and axle

• lever

Where should the fulcrum be placed in order for the student to use the least amount of effort possible? 

• point A
• point B
• point C
• point D

When force is used to move an object across a distance, this is called...

• effort

• power

• energy

• work

How much work is done if I use 5N of force to move an object 2 meters?

• 10 Newtons

• 7 Newtons

• 10 Joules

• 7 Joules

What is effort (input) force?

• the force required by a machine in order to accomplish work (the force you put on the machine)
• the force which an effort force must overcome in order to do work on an object via a simple machine.
• the force the machine exerts on a object
• the output work times the input distance

What is resistance (output) force?

• the force required by a machine in order to accomplish work (the force you put on the machine)
• the force which an effort force must overcome in order to do work on an object via a simple machine.
• the force the machine exerts on a object
• the output work times the input distance

Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?

• 1
• 10
• 100
• 1000

A fishing pole is an example of a compound machine. What simple machines are used to make up this compound machine?

• lever, wheel and axle, pulley
• wheel and axle, inclined plane, pulley
• wheel and axle, pulley, inclined plane

What type of simple machines does the photo show?

• Lever and wedge
• Inclined Plane and lever
• Pulley and wedge
• Lever and screw