Unit 6 Force Acceleration and Motion

The data table shows the velocity of an object over 12 seconds. Which BEST describes the motion of the object between 6 to 10 seconds?

• A. Velocity remains constant while the acceleration is at zero.

• B. Velocity is increasing while the acceleration remains constant.

• C. Velocity is decreasing while the acceleration is increasing.

• D. Velocity is at zero while the acceleration remains constant.

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NGSS.MS-PS3-1

Seat belts are designed to prevent severe injuries during a car collision. Which BEST explains how seat belts affect the change in momentum experienced by the passengers?

• A. Seat belts decrease the impact force by decreasing the time of momentum change.

• B. Seat belts increase the impact force by increasing the time of momentum change.

• C. Seat belts decrease the impact force by increasing the time of momentum change.

• D. Seat belts increase the impact force by decreasing the time of momentum change.

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NGSS.MS-PS2-2

NGSS.MS-PS2-1

Which graph shows an object experiencing constant positive acceleration?

• Graph A: A straight line with a positive slope.

• Graph B: A curve with increasing slope.

• Graph C: A horizontal line.

• Graph D: A straight line with a negative slope.

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NGSS.MS-PS3-1

Which BEST describes the motion of the object during the 5 seconds?

• The velocity increased for 3 seconds, then remained constant for 2 seconds.

• The velocity remained constant for 3 seconds, then decreased for 2 seconds.

• The acceleration increased for 3 seconds, then remained constant for 2 seconds.

• The acceleration remained constant for 3 seconds, then decreased for the next 2 seconds.

The velocity versus time graph shows the motion of an object over 55 seconds. The ball experienced a positive acceleration between which of the following time intervals?

• 20 and 30 seconds

• 30 and 35 seconds

• 35 and 50 seconds

• 0 and 20 seconds

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NGSS.MS-PS3-1

The ball experienced no acceleration between which of the following time intervals?

• 0 and 20 seconds

• 20 and 30 seconds

• 35 and 50 seconds

• 30 and 35 seconds

Impulse is a change in momentum and is calculated using which of the following equations?

• Impulse = force × change in time

• Impulse = mass × velocity

• Impulse = force × distance

• Impulse = mass × acceleration

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NGSS.HS-PS2-2

NGSS.HS-PS2-3

When a force is applied to an object over a longer time, what happens to the change in momentum?

• It decreases

• It increases

• It remains the same

• It becomes zero

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NGSS.HS-PS2-1

The graph shows the velocity of an object over a 55 second interval. Describe the object's velocity and acceleration between 35 and 50 seconds. The velocity:

• is at zero

• increases

• decreases

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NGSS.MS-PS3-1

Impulse is a change in the momentum of an object. The table shows an object's change in momentum over four trials. Which statement correctly compares the impulse?

• The object experienced the least impulse during Trial 1.

• The object experienced the greatest impulse during Trial 4.

• The object experienced a lower impulse during Trial 4 than during Trial 3.

• The object experienced a greater impulse during Trial 1 than during Trial 2.

Tags

NGSS.HS-PS2-2