Simple machines

How does a movable pulley make lifting objects easier? 

• The amount of force needed is doubled
• the amount of force needed is increased
• the amount of force needed is reduced
• the amount of force needed stays the same

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

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

This has one or no moving parts. 

• simple machine
• complex machine

a wheel with a rope or belt around it. Helps a person lift or move something up, down, or across an area. 

• screw
• pulley

-a ramp
-flat surface that is higher at one end. 
-helps a person move something up or down from one place to another

• inclined plane
• pulley

-a flat bar that rests on a fulcrum
-helps a person move or lift something
-example is a see-saw

• lever
• wedge

Which is NOT true about complex machines?

• made up of one simple machine
• made up of two or more simple machines
• made of zero moving parts

Energy of motion is which type of energy?

• Potential
• Kinetic
• Sound

Stored energy that an object has due to its position or chemical composition is...

• Potential
• Kinetic
• Mechanical