5.7AB Teacher Presentation Force

Multiple Choice

Which of the following is NOT one of the three types of forces we are going to explore?

• Magnetism

• Friction

• Gravity

• Electricity

Open Ended

Why is understanding different types of forces important in our daily lives?

Multiple Choice

Which of the following best describes a force?

• A push or a pull

• A type of energy

• A kind of sound

• A form of light

Open Ended

Explain how gravity and push/pull forces are acting on the children jumping rope in the image.

Fill in the Blanks

Force is measured in

(use the symbol).

Multiple Select

Which of the following statements about force are correct?

• Force can change the position of an object.

• Force is measured in newtons (N).

• Force is a type of sound.

• Force can change the direction in which an object moves.

Multiple Choice

What happens when equal forces are applied in opposite directions on an object?

• The object does not move.

• The object speeds up.

• The object changes direction.

• The object melts.

Open Ended

Describe what is meant by balanced forces and give an example from everyday life.

Open Ended

Students apply equal forces to both sides of an object. Is a transfer of energy occurring?

Open Ended

Do equal forces result in work being done? Explain.

Multiple Choice

Which of the following is a result of unequal forces acting on an object?

• The object remains at rest

• The object changes direction

• No work is done

• The forces cancel each other out

Multiple Choice

When the forces acting on an object are unbalanced, what happens to the object's motion?

• It stays the same

• It changes

• It disappears

• It becomes balanced

Fill in the Blanks

Unbalanced forces can cause an object's motion to

, start, speed up, slow down, and change direction.

Multiple Choice

Which of the following statements about gravity and magnetism is correct?

• Gravity can push or pull objects from a distance.

• Magnetism only pulls objects downward.

• Gravity pulls objects toward the center of Earth.

• Like sides of a magnet attract each other.

Multiple Choice

Which of the following metals is NOT magnetic?

• Steel

• Iron

• Nickel

• Copper

Fill in the Blanks

Gravity is a force that pulls objects toward the

of the Earth.

Fill in the Blanks

Is gravity a force that pushes or pulls?

Multiple Select

Which of the following statements about friction is/are correct?

• Friction always increases the speed of an object.

• Friction can transform mechanical energy into thermal energy.

• Rough surfaces cause more friction than smooth surfaces.

• Friction is a force that resists motion.

Multiple Choice

What is friction?

• A force that resists motion

• A force that increases motion

• A force that creates energy

• A force that attracts objects

Multiple Select

Which of the following statements about friction are correct?

• Friction causes motion to slow or stop.

• Friction is a contact force.

• Friction is responsible for shaping Earth's surface.

• Friction increases the speed of moving objects.

Open Ended

Based on the experiment with the disk and three surfaces, explain how you can determine which surface has the most friction.

Fill in the Blanks

Rough surfaces create

friction than smooth surfaces.

Multiple Choice

Which of the following is an example of a use of magnetism?

• Doorbells

• Washing dishes

• Weathering of rock

• Transportation

Multiple Choice

Which of the following is NOT a use of friction?

• Washing dishes

• Weathering of rock

• Transportation

• Credit cards

Open Ended

How do forces, along with energy, make it possible for us to do work in our daily lives? Give an example from your own experience.