Simple Machines

A student uses this tool to build a project made from wood.  The student uses Part X to remove a nail from the wood.  Part X is being used as a 

• a lever
• a screw
• an inclined plane
• a wheel and axle

Which inclined plane makes work easiest (consider IMA)?

• A very steep one

• A very long one

• A very wide one

• A very skinny one

In the image above,what advantage does Pulley A provide?

• It changes the direction of the force

• It reduces the amount of effort needed to lift the object

• It reduces the resistance force

• It does not provide any advantages

Which of these Pulley Systems change the direction of the effort force?

• Pulley Systems A C and E only

• Pulley Systems C and E only

• Pulley Systems B and D only

• All of these change the direction of the force

Which of these Pulley Systems reduce the amount of effort needed?

• All of these except for Pulley System A

• Pulley Systems B and D only

• Pulley Systems C and E only

• All of these reduce the amount of effort needed

Which of these options would reduce the effort needed to lift a load the most?

• A really short and very steep inclined plane
• A very long and very steep inclined plane
• A very long and not very steep inclined plane
• Not using an inclined plane and instead lifting the object straight up

The place where a lever pivots is called the _______.

• Load
• Force/Effort
• Fulcrum
• Rigid Bar

_________ is an example of a lever.

• Hammer
• Crowbar
• Wheelbarrow
• All of the above

Simple machines (lever, inclined plane, wedge, screw, pulley, wheel and axle) can do which of the following?

• Reduce the mass of an object that needs to be moved

• Reduce the distance an object needs to be moved

• Reduce the amount of time needed to move an object over a distance

• Reduce the force needed to move an object over a distance

A simple machine that is made up of an inclined plane wrapped around a cylinder. It is often used to hold things together.

• lever
• screw
• wedge
• velcro