Non Contact Forces

Field

A region of influence around objects that exert a non-contact force.

Mass

A measure of the amount of matter in an object.

Weight

A measure of how Earth's gravitational force is pulling on an object.

Gravity

Attraction between any two objects in the universe.

Law of Universal Gravitation

All objects attract each other through gravitational force.

Magnet

Anything that produces a magnetic field around itself.

What 3 metals can be magnetic?

Iron, Nickel, and Cobalt

Iron filings

Tiny pieces of iron that help us see magnetic field lines

Which magnetic poles attract?

Opposite poles, north and south

Which magnetic poles repel?

Like poles, south and south or north and north

Electrons

Negatively charged particles

Protons

Positively charged particles

Which particles attract each other?

Opposite charges, positive and negative

Which particles repel each other?

Like charges, positive and positive or negative and negative

Electricity

the interaction between electric charges

Static discharge

the loss of static electricity as electric charges transfer from one object to another.

Electric current

the continuous flow of electric charges through a material.

Electric circuit

A complete, unbroken path that charges can flow through is called an electric circuit.

Electromagnetism

the relationship between electricity and magnetism

Electromagnet

a coil of wire with a current (solenoid) and a ferromagnetic (iron) core

Solenoid

coil of wire with a current running through it

Mechanical energy

energy from motion

Generator

convert mechanical energy into electricity

Electric motor

convert electricity into mechanical energy