Newton's Laws - TEKS 8.6A/C Review

Which arrow shows the direction of the net force acting on the object?

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NGSS.HS-PS2-1

Four students push carts filled with sports equipment across the gym. Each student pushes with the same amount of force. Which cart has the greatest change in speed?

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NGSS.HS-PS2-1

Which statement best describes what will happen to a soccer ball that is rolling across a field when it is kicked by a player?

• It will stop.

• It will accelerate.

• It will lose speed.

• It will maintain velocity.

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NGSS.HS-PS2-1

Deep Space 1 was a spacecraft powered by an engine that gave off xenon particles to change velocity. It had a mass of 500kg. Which expression can be used to find the spacecraft's acceleration if its engine created a net force of 0.10N?

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NGSS.HS-PS2-1

Which objects in the list experience an unbalanced force?

• The book, the ball, and the car

• The ball, the car, and the bird

• The can, the swing, and the bird

• The book, the ball, the can, and the swing

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NGSS.HS-PS2-1

How can Newton's law of action-reaction best be applied to explain the movement of a rocket?

• As the fuel burns, gases push against the rocket, moving it upward.

• As the fuel burns, gases move out of the rocket and reduce air resistance.

• As the fuel burns, the mass of the rocket decreases.

• As the fuel burns, the rocket moves faster.

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NGSS.HS-PS2-1

During a demonstration of Newton's laws of motion, a student used the setup shown in Figure 1. The student flicked the index card with a fingertip, and the coin fell straight down into a plastic cup as shown in Figure 2.

Which of these best explains why the coin fell straight down into the cup instead of remaining on the index card?

• The coin was at rest until the card was removed, so it tended to remain in the same location. Once the card was gone, the unbalanced force of gravity caused the coin to fall.

• Moving the crd applied an action force on the coin. Since the card was gone, gravity applied a reaction force on the coin.

• The card had less mass than the coin, so a smaller force of gravity acted on the card. The larger force of gravity on the coin made it fall.

• The acceleration of the coin falling into the cup was equal and opposite to the acceleration of the card.

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The masses of four vehicles and the net forces acting on them as they enter a highway are recorded in the table.

Which vehicle has the greatest acceleration as it enters the highway?

• Sedan

• Coupe

• SUV

• Truck

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NGSS.HS-PS2-1

Two cars with different masses travel at the same speed down a hill toward a stop sign. What will happen when both cars apply brakes at the same time to stop?

• The car with the smaller mass will require less force to stop than the car with the larger mass.

• The car with the larger mass will maintain its velocity while traveling down the hill.

• The car with the smaller mass will take longer to stop than the car with the larger mass.

• The car with the larger mass will have less inertia than the car with the smaller mass.

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NGSS.HS-PS2-1

The diagram shows two different forces acting on a cyclist riding a bicycle. The total mass of the cyclist and the bicycle is 100.0kg. Based on this information, what is the acceleration of the cyclist?

• 0.66m/s² backward, because the force of the air slows the cyclist down

• 0.66m/s² forward, because the applied force is greater than the force of the air

• 2.3m/s² backward, because the forces are opposite and not equal

• 2.3m/s² forward, because the cyclists inertia is greater than the force of the air

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