Force & Motion Unit Exam

The data table below is for the motion of a runner who runs a total distance of 10 meters. What is the average speed of the runner from start to finish?

• 2.5 m/s

• 40 m/s

• 0.4 m/s

• 3 m/s

Which of the following graphs shows an object that is not in motion on a distance vs. time graph?

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• 
• 
• 

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The space shuttle Endeavor is launched to an altitude of 500 km above the surface of the Earth. The shuttle travels at an average rate of 700 km/s. How long will it take for Endeavor to reach its orbit?

• 1200 seconds

• 1.4 seconds

• 350,000 seconds

• 0.71 seconds

Natalie accelerates her skateboard along a straight path from 0 m/s to 4.0 m/s in only 2.5 sec. What is her average acceleration?

• -1.6 m/s²

• 1.6 m/s²

• -10 m/s²

• 0.63 m/s²

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At 9:00 pm, ladybug #1 crossed the 3 cm mark with a velocity of 4 cm/min. In a great burst of energy, ladybug #1 raced to the 5cm mark in 3 minutes. Her velocity as she crossed the 5 cm mark was 7 cm/min. What was the acceleration of ladybug #1?

• 3 cm/min²

• -2 cm/min²

• 1 cm/min²

• -1 cm/min²

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Which of the following is NOT a property of forces?

• Forces can make objects start moving.

• Forces can make objects move faster.

• Forces can make objects change shape.

• Forces do not affect motion.

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Beth drops a feather and a marble from the same place at the same time. She notices that the feather falls to the ground much slower than the marble. Which of the following statements best explains Beth’s observation?

• Inertia causes the feather to become lighter as it falls to Earth’s surface.

• Gravity pulls them both to Earth at the same speed and they both should fall at the same time.

• Air resistance acts on the feather causing it to fall slower.

• The mass of the feather is not great enough to increase its speed; therefore, it falls slower.

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What is the net force necessary for a 150 kg tractor to accelerate forward at 3 m/s²?

• 50 kg m/s²

• 450 kg m/s²

• 0.02 kg m/s²

• 300 kg m/s²

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Which one of Newton’s three laws of motion is being illustrated in the drawing below?

• Newton’s law of universal gravitation

• Newton’s first law of motion, the law of inertia

• Newton’s second law of motion, F=MA

• Newton’s third law of motion, action = reaction

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Which conclusion can be made from the graph?

• They stopped often along the way.

• They traveled at a fairly constant velocity.

• There were different drivers at different times during the journey.

• They were driving slowly at first, but their velocity increased every hour.

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