Chapter 3 Work Power Simple Machines

What term describes an inclined plane wrapped around a cylinder?

• wedge
• screw
• fulcrum
• axle

What is the ratio of a machine's output force to its input force?

• efficiency
• equal output
• mechanical advantage
• output work

What is transferred when work is done?

• distance
• energy
• force
• power 

What does a lever rotate around?

• axle
• fulcrum
• screw
• wedge

What two things must you know to calculate work?

• distance and length
• force and distance
• force and power
• height and weight 

What are levers, wheels and axles, inclined planes, wedges, screws, and pulleys examples of?

• complex machines
• compound machines
• idea machines
• simple machines

Which refers to the ratio of a machine's output work to its input work?

• efficiency
• input force
• mechanical advantage 
• output force 

Which is the product of the output force and the distance over which the output force is applied?

• machine
• input work
• output work
• mechanical advantage 

Which is the rate at which work is done?

• energy
• force
• power
• work

When you lift an object, what else are you doing?

• decreasing the objects energy
• increasing the objects energy
• making the object do work
• receiving the objects energy