Chapter 3

What is energy?

• when an object changes position compared to another object.

• the ability to do work or cause change

• a push or pull

• when a force is exerted on an object that causes that object to change it's motion.

What is motion?

• when an object changes position compared to another object.

• the ability to do work or cause change

• a push or pull

• when a force is exerted on an object that causes that object to change it's motion.

What is force?

• when an object changes position compared to another object.

• the ability to do work or cause change

• a push or pull

• when a force is exerted on an object that causes that object to change it's motion.

What is work?

• when an object changes position compared to another object.

• the ability to do work or cause change

• a push or pull

• when a force is exerted on an object that causes that object to change it's motion.

What is power?

• when an object changes position compared to another object.

• the ability to do work or cause change

• the rate at which work is done

• when a force is exerted on an object that causes that object to change it's motion.

Is work done if you hold a heavy object for a long time?

• yes

• no

The maximum amount of work is done when movement and force are in ________________ directions.

• same

• different

work =

• power x force

• force x distance

• energy x force

the unit to measure power is called the

• watt

• joule

• volts

The unit to measure work is called the

• watt

• joule

• energy