Types of Forces

Types of Forces

Describe how fields can be used to explain the effect of forces that act at a distance

• Affect any object made from a magnetic material

  • ex- iron

• Affect any objects with charged field

  • ex- compass

Magnetic

-Affects any object with mass

Gravitational

Fields

Electric

-a field generated by a charged object

Multiple Select

What kinds of objects will experience a force when put in a magnetic field? Choose ALL that apply.

• Any object with mass.

• Any object that carries a positive or negative charge.

• Any object that is made from a magnetic material.

• Any object that is already in motion

Multiple Choice

Why should a strong magnet not be placed near a credit or debit card?

• The cards use a magnetic strip that can be affected by the magnet.

• The magnet will discolor the card.

• The magnet can magnetize the card, causing it to become a magnet.

• The cards will not be affected by the magnet.

Multiple Choice

How does a compass work?

• Earth is a magnet that attracts all negatively charged objects, like the compass.

• Both Earth and a compass are magnets, and the compass aligns with Earth's magnetic field.

• The needle of the compass is a magnet which is a north pole pointing to Earth's South Pole.

• The needle of the compass is a magnet, which is a south pole pointing to Earth's North Pole.

Multiple Choice

What kinds of objects will be affected by a gravitational field?

• Only objects that are made from a a magnetic material will be affected.

• Only objects that carry a positive or negative charge will be affected.

• Any object with mass will be affected.

• Only objects that are electrically neutral will be affected.

Multiple Choice

What is true about an electric field?

• It is a field generated by any charged object.

• It is a field generated by any object in motion.

• It is a field generated by any object with a mass.

• It is a field generated by any two objects touching each other.

Multiple Choice

A negative charge is attracted to ...

• a neutral

• a negative

• a positive

Describe the properties of gravitational forces.

Gravitational Force

In Space

• The magnitude of the gravitational force between two planets depends on the distance between the planets

• Objects on Earth are influenced more by the gravity of Earth than by the gravity of the Sun

• The Sun is the strongest source of gravity in the Solar System

• The Earth's mass is a factor responsible for the Earth's gravity

​The attraction depends on the mass of an object and the distance between the objects.

Gravitational Pull

A higher mass creates a
higher gravitational pull

Multiple Choice

What is the factor responsible for Earth’s gravity?

• The sun.

• The moon.

• Earth’s mass.

• Earth’s atmosphere.

Multiple Choice

What keeps all the planets in orbit around the sun in our solar system and is ALWAYS ATTRACTIVE?

• Potential energy.

• Electromagnetic energy.

• Gravitational force.

• Electromagnetic force.

Multiple Choice

When placed at equal distances apart, the greatest gravitational attraction will be between two...

• bowling balls.

• school buses.

• skateboards.

• refrigerators.

Multiple Choice

The gravitational force of the Sun is powerful enough to hold Earth in orbit even though Earth is an average of 150 million kilometers away. Which statement best describes why objects with much less mass than Earth are not pulled off the surface of Earth toward the Sun?

• Objects on Earth are orbiting the Sun too quickly.

• Objects on Earth have too little mass on which to pull.

• Objects on Earth are influenced more by the gravity of Earth than by the gravity of the Sun.

• Objects on Earth are held by the gravity of the Moon.

Multiple Choice

What is the relationship between mass and gravitational pull?

• Lower gravitational pull creates more mass.

• Higher gravitational pull creates more mass.

• Lower mass creates higher gravitational pull.

• Higher mass creates higher gravitational pull.