Force Lesson Review pg 421

What is a measure of the amount of matter in an object?

• Volume

• Density

• Mass

• Weight

What force resists motion between two surfaces in contact?

• Gravitational force

• Friction

• Magnetic force

• Tension

What force causes an object to move in a circle?

• Centripetal force

• Gravitational force

• Friction

• Tension

What is the action force when you press down on a chair?

• The chair pressing up on your body

• Your body pressing down on the chair

• The air around the chair

• The floor supporting the chair

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What is the reaction force when you press down on a chair?

• The chair pressing up on your body

• Your body pressing down on the chair

• The air around the chair

• The floor supporting the chair

How do you determine net force when forces act in the same direction?

• Add the forces together

• Subtract the forces

• Multiply the forces

• Divide the forces

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How do you determine net force when forces act in opposite directions?

• Add the forces together

• Subtract the smaller force from the larger force

• Multiply the forces

• Divide the forces

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What happens to a crash dummy in a car when the car stops suddenly?

• The dummy moves backward

• The dummy remains stationary

• The dummy keeps moving forward

• The dummy moves sideways

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What force keeps a rock known as Balanced Rock in place?

• Friction

• Gravity

• Inertia

• Tension

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Which of the following is an example of a reaction force?

• A car accelerating

• A ball rolling down a hill

• A chair pressing up on a person

• A leaf falling from a tree

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