Newton's Laws

What will happen if you're in a car, and the driver slams on the brake?

• You will stop moving.

• You will continue moving forward

• You will gradually slow down.

• You will speed up.

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According to Newton's first law, an object in motion will stay in motion unless:

• An opposing force acts on it.

• It's in outer space.

• It stops.

• It remains at rest.

What might happen if you were in a braking car, and you weren't wearing your seat belt?

• You'd fly backward through the rear window.

• You'd be pressed backward into your seat

• You'd fly forward through the windshield.

• You'd move sideways through the passenger door

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What causes a ball rolling across a rug to slow to a stop?

• The rug doesn't have enough force to hold the ball.

• Friction resists the ball's forward motion.

• The rug doesn't have enough momentum to keep the ball moving

• The ball isn't moving fast enough.

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What part(s) of a moving car experience the most friction? Choose the best answer.

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Which of the following is an opinion about friction?

• It occurs any time two objects are in contact

• It always acts in the opposite direction as motion

• It slows objects down too much

• It prevents objects on earth from staying in motion forever

If an unbalanced force acts on an object, what will happen?

• It will not move at all.

• It will accelerate in the same direction as the force.

• It will accelerate in the opposite direction to the force

• It will accelerate at an angle of 90 degrees to the force.

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What two factors affect gravity?

• distance and speed

• mass and speed

• time and distance

• mass and distance

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What statement describes the forces acting on you as you slide down a water slide?

• Intertia keeps you moving in a straight path. Gravity is slowing you down. Friction is reduced.

• Intertia keeps you moving in a straight path. Gravity is speeding you up. Friction is reduced.

• Intertia keeps you moving in a straight path. Gravity is slowing you down. Friction is increased.

• Intertia keeps you moving in a straight path. Gravity is speeding you up. Friction is increased.

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According to Newton's third law, what happens when you push against a wall?

• The wall pushes back at you half as hard as you push against it.

• The wall doesn't resist at all.

• The wall pushes back at you with the same amount of force

• The wall pushes back at you twice as hard as you push against it.

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