Work & Energy

What is work defined as in physics?

• Stored energy

• Energy due to motion

• The ability to cause change

• Force applied through a distance

Tags

NGSS.MS-PS3-5

What does a machine do?

• Decreases the motion from work

• Changes the force or increases the motion from work

• Only transfers energy

• Stores energy

What is a simple machine?

• A device that uses electricity to do work

• A machine that does work with multiple movements

• A combination of two or more machines

• A machine that does work with only one movement of the machine

What is a compound machine?

• A machine that reduces work

• A device that changes energy forms

• A combination of two or more simple machines

• A simple machine with one movement

Tags

NGSS.MS-PS3-1

How is efficiency calculated?

• Output work divided by input work

• Input work divided by output work

• Input force divided by output force

• Output force divided by input force

What does mechanical advantage represent?

• The ability to do work

• The ratio of the output energy to input energy

• The sum of kinetic and potential energy

• The ratio of the output force to input force

What is energy?

• The ratio of output work to input work

• A device that changes the force

• The ability to cause change

• Force applied through a distance

What is a system?

• A device that does work

• A collection of machines

• Anything around which you can imagine a boundary

• An object in motion

What is kinetic energy?

• Energy due to motion

• Energy stored by stretching an object

• Energy due to position

• Energy due to chemical bonds

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is potential energy?

• Energy due to motion

• Stored energy

• Energy that can cause change

• The sum of all energies in a system

Tags

NGSS.MS-PS3-2