8.7 B Check #1

Which of the following is an example of Newton's First Law of Motion?

• A car accelerating when the traffic light turns green.

• A book remaining at rest on a table until someone moves it.

• A rocket launching into space.

• A ball rolling down a hill.

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TEKS.SCI.8.7B

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TEKS.SCI.8.7B

What is the primary focus of Newton's Second Law of Motion?

• Objects in motion stay in motion.

• For every action, there is an equal and opposite reaction.

• Force equals mass times acceleration.

• Objects at rest stay at rest.

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TEKS.SCI.8.7B

Describe how Newton's Third Law of Motion is demonstrated when a swimmer pushes against the wall of a pool.

• The wall pushes back with equal force, propelling the swimmer forward.

• The swimmer moves backward due to the force of gravity.

• The swimmer remains stationary due to balanced forces.

• The swimmer accelerates downward due to water resistance.

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TEKS.SCI.8.7B

Which of the following scenarios best illustrates Newton's Third Law of Motion?

• A car stopping at a red light.

• A person jumping off a boat causing the boat to move in the opposite direction.

• A satellite orbiting Earth.

• A ball thrown straight up into the air.

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TEKS.SCI.8.7B

Explain how Newton's laws of motion apply to a roller coaster ride.

• The coaster remains at rest until acted upon by an external force.

• The coaster accelerates due to gravitational force and changes direction due to applied forces.

• The coaster moves in a straight line at constant speed.

• The coaster's speed is unaffected by the track's shape.

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TEKS.SCI.8.7B

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

• Joule

• Newton

• Watt

• Pascal

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TEKS.SCI.8.7B

A 10 kg object is at rest. What is the net force acting on it?

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TEKS.SCI.8.7B

Which of the following best describes inertia?

• The tendency of an object to resist changes in its state of motion.

• The force required to accelerate an object.

• The energy stored in an object due to its position.

• The rate of change of velocity.

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TEKS.SCI.8.7B

How do Newton's laws of motion explain the movement of tectonic plates?

• Plates remain stationary due to balanced forces.

• Plates move due to unbalanced forces acting upon them, causing earthquakes and volcanic activity.

• Plates accelerate uniformly across the Earth's surface.

• Plates are unaffected by external forces.

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TEKS.SCI.8.7B