What is the unit of force in the International System of Units (SI)?

• Kilogram

• Meter

• Newton

• Joule

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What is a reference point?

• A stationary object used to determine if something is in motion

• A moving object used to determine if something is in motion

• A point in space with no significance

• A force acting on an object

According to the text, what is the dog’s motion relative to the car?

• The dog is moving

• The dog is not moving

• The dog is flying

• The dog is shrinking

What is the effect of a horse pulling a man in a buggy?

• The horse exerts a force on the buggy

• The buggy exerts a force on the horse

• The horse and buggy exerts an equal force.

• There is no movement

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What does the direction of a force indicate?

• The speed of the object

• The mass of the object

• The direction in which the force acts

• The size of the object

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Which force pulls objects toward each other as a result of their masses?

• Friction

• Electrical force

• Gravity

• Magnetism

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What causes a change in an object's motion? Page 195

• A balanced force.

• A nonzero net force.

• A zero net force.

• A single force.

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A diagram, go to Page 195, showing a tug-of-war competition with people pulling on both sides of a rope.

• A diagram showing a soccer match.

• A diagram showing a tug-of-war competition with people pulling on both sides of a rope.

• A diagram showing a basketball game.

• A diagram showing a swimming competition.

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Use Page 196, What is the net force on an apple when two animals push it with forces of 3N and 3N in opposite directions?

• 0N

• 3N

• 6N

• 9N

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How can you determine if skydivers are in motion? Pages 186-187

• By comparing their position to a fixed reference point.

• By comparing their position to the sky.

• By comparing their position to each other.

• By comparing their position to the ground.