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## Transcript

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electricity and magnetism

S8P5

Start

EQ: IN ADDITION TO GRAVITY, WHICH NONCONTACT FORCES PRODUCE FORCE FIELDS?

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ASSESSMENT

ASSESSMENT

MA FORCE VIDEO

EF VIDEO

FORCE VIDEO

MAG FORCE EX

Electric Force EX

FORCE EX

FORCE

Electric Force

Magnetic Force

SECTIONS

• A FORCE IS A PUSH OR PULL OF AN OBJECT EVEN WITHOUT CONTACT
• EX: GRAVITATIONAL, MAGNETIC, AND ELECTRICAL FORCES ARE ALL CONSIDERED NONCONTACT

FORCE

LEFT: GRAVITATIONAL FORCE MIDDLE: ELECTRIC FORCE RIGHT: MAGNETIC FORCE

EXAMPLES OF FORCE

section 1/3

Electric forces & fields

Force & Fields introduction

field lines

Field Lines are a visual representation of force. They show the path in which an object will be pushed or pulled when acted upon.

interactions of forces

Electric, magnetic, and gravitational forces can affect the behavior interactions between objects exerting forces on each other even when the objects are not in contact

The electric field lines point in the direction that a positive charge would accelerate if placed upon the line.

Unlike charges attract one another ( - and +) Like charges repel (go against) one another ( + and + )

Electric Forces and Fields

attraction of charges

electric forces

Electrically charges particles such as protons and electrons in atoms and molecules, have attractive and repulsive interactions with other charged particles.

To the right you will see the direction of positive charges accelerating on the field lines of electric forces.

Electric force examples

Shock-a-lot

\“What is an electrician’s favorite flavor of ice cream? Shock-a-lot.”

+ info

This video explains electric charges and currents

electric charge

#### ASSESSMENT

QUESTION 3

Unlike charges _______Like charges ________

QUESTION 2

What is an electric force?

QUESTION 1

WHAT ARE THE THREE TYPES OF NONCONTACT FORCES?

section 2/3

magnetic forces & fields

MAGNETS HAVE TWO POLES NORTH & SOUTH Opposites Attract ( N -S) Likes Repel ( N - N)MAGNETIC North is the direction a compass needle points to, as it aligns with Earth's magnetic field

Magnetic Forces & Fields

magnetic fields

The area of magnetism, or magnetic influence, surrounding the magnet is known as the Magnetic FieldMagnets near one another will push or pull one another depending on how their fields interact

magnetic forces

The magnetic force decreases as the distance between the magnets increaseThe magnetic force is the strongest inside the magnet and near the poles where the field lines come together

Magnetic Force & Fields

magnetic fields

On a magnet, the field lines point from the north pole to the south pole This is the direction another magnet would be pulled if brought close to it

magnetic forces

From observations, we know that two magnets exert force on one another. However, we cannot see contact between the magnets when they start pulling on one anotherTherefore, we use field linesthE

Magnetic Force & Fields

magnetic forces conclusion

A compass points to TRUE NORTH (South) and TRUE SOUTH (North) of EarthMagnetic North of Earth is different than the NORTH POLE of a magnet

magnetic forces

The image to the right shows the TRUE NORTH and TRUE SOUTH poles of Earth. Which explains why our compasses point upwards for NORTH and downwards for SOUTH

magnetic force examples

The Fridge

Why did the magnet break up with the fridge? It wasn’t attracted to it anymore.

magnetic field

Question 3

What is a magnetic field?

Question 2

What is Magnetic North?

Question 1

Magnets have two poles which are _____ and _____

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PROCESS

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section 3/3

gravitational force & fields

Gravitational Force & Fields

GRAVITATIONAL Force

Objects with mass are sources of gravitational fields and are affected by the gravitational fields of all other objects with mass

GRAVITATIONAL fORCE

Gravitational forces are always attractive between two objects, but these forces are much weaker than electric force

Gravitational Force & Fields

GRAVITATIONAL Field

A gravitational field is the force field that exists in the space around every mass or group of masses. This field extends out in all directions, but the magnitude of the gravitational force decreases as the distance from the object increase

GRAVITATIONAL force

Gravitational force extends across the space between two masses, but it is minimal except when one or both objects have a vast mass

Gravitational Force & Fields

GRAVITATIONAL force - large scale systems

For large-scale systems in space, such as galaxies, the solar system, or Earth and Sun, long-range gravitational forces determine the movement patterns within those systems.

+ info

Take a look at the image to see an eample of a large-scale system gravitational force exertion in space

gravitational force examples

Big Gravity

Why didn't the lady like thinking about gravity? It kept bringing her down.

The video will explain gravitational force

gravity

Question 3

Describe Gravitational Force in a large-scale system.

Question 2

What is a gravitational field?

Question 1

What is gravitational force?

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CONCLUSION VIDEO

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