Unit 2 Force and Motion Review

What is force?

• Force is a push or pull that can change the motion of an object.

• Force is a type of energy.

• Force is the speed of an object.

• Force is the mass of an object.

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What is motion?

• Motion is the change in position of an object over time.

• Motion is the speed of an object at rest.

• Motion is the color of an object in space.

• Motion is the force applied to an object.

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What unit is force measured in?

• newtons

• watts

• pascals

• joules

What is Newton's first law of motion?

• An object will remain at rest or in uniform motion unless acted upon by an external force.

• An object will change direction only if a force is applied.

• An object will accelerate if no force is applied.

• An object in motion will eventually stop without any force.

What force acts on a ball when it hits the ground and prevents it from sinking into the ground it falls on?

• friction (allows ball to roll on the ground)

• normal force (the ground pushes back on the ball)

• magnetism (repels the ball away from the ground)

• friction (slows the ball down)

Which of these is NOT a Non-Contact Force?

• Gravity

• Magnetism

• Friction

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What is the net force of Cart 2?

• 5 N

• 4 N

• 6 N

• 3 N

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What is friction?

• Friction is the energy lost when two surfaces are heated together.

• Friction is a force that resists the motion of two surfaces sliding across one another.

• Friction is the attraction between two surfaces that keeps them together.

• Friction is the force that enhances the motion of two surfaces in contact.

What are the types of forces?

• Frictional forces and gravitational forces

• Centrifugal forces and elastic forces

• Contact forces and non-contact forces

• Magnetic forces and thermal forces

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What is gravitational force?

• Gravitational force is the repulsion between two masses.

• Gravitational force is the attraction between two masses.

• Gravitational force is the force that keeps objects in motion.

• Gravitational force is the energy produced by a mass.

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