Force and Motion

1. Which of the following statements about speed and velocity is correct?

• Velocity only describes an object’s rate of motion.
• Speed describes how an object is changing its velocity.
• Speed and velocity both describe how an object is speeding up.
• Only velocity includes the direction an object is traveling.

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NGSS.MS-PS3-1

2. Which of the following objects is not changing its velocity?

• A golf ball rolling down a ramp
• A skateboard rolling up a hill
• A cue ball rolling forward at a constant speed
• A marble going around the curve in a track

Acceleration describes how an object’s velocity is changing.  Which of the following scenarios provides the best example of an accelerating object?

• A car driving at a constant speed
• A book sitting on top of a high shelf
• A toy train traveling in a circle
• A toy boat floating in a bathtub

In which time interval was the speed of the object decreasing?

• between 0 s and 2 s
• between 2 s and 4 s 
• between 6 s and 8 s
• between 8 s and 10 s

Tags

NGSS.MS-PS3-1

In which time interval was the object speeding up?   

• between 0 s and 2 s
• between 2 s and 4 s
• between 6 s and 8 s
• between 8 s and 10 s

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NGSS.MS-PS3-1

Which of the following best describes the object’s motion between 6 s and 8 s?

• The object sped up

• The object sped up

• The object remained motionless

• The object moved at a constant speed

Tags

NGSS.MS-PS3-1

What does this graph represent?

• Constant Speed
• Acceleration
• Not moving

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NGSS.MS-PS3-1

How long did it take this object to travel 10 m?

• 0 s
• 10 s
• 15 s
• 20 s

How long did it take this object to travel back to its starting point?

• 20 s

• 30 s

• 60 s

• 100 s

What is happening at C?

• Stationary

• Positively accelerating

• Fast steady speed; moving away from the starting position

• Negatively accelerating

Tags

NGSS.MS-PS3-1