Velocity or Acceleration?

This occurs when an object speeds up, slows down, or changes direction. (a)  

• Speed
• Velocity
• Acceleration

You rode your dirt bike in a straight line at a constant speed of 10 km/h. Did you accelerate?

• Acceleration occurred because speed changed.

• Acceleration did not occur because neither speed nor direction changed.
• Acceleration occurred because you changed directions.

You rode a four-wheeler through the mountains (curves were frequent, and you had to slow down for them).  You accelerated because when you slow down, the speed

(a)   . You also accelerated because the curves mean you (b)  

• did not change 
• changed
• changed direction
• did not change direction 

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Acceleration is

• distance divided by time usually represented in m/s in science

• the speed and direction that an object is traveling in

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NGSS.MS-PS2-2

Changing direction is a form of

(a)  

• velocity
• acceleration (or negative acceleration)

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NGSS.MS-PS2-2

Match

• Deceleration (negative acceleration)

• 
• Acceleration (change speed, direction)

• 
• No acceleration = no change

• 

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Objects moving with circular motion are constantly (a)   because direction (​ (b)   ) is constantly changing

• accelerating
• velocity

A decrease in speed is known as

negative acceleration or (a)  

• tenacious slowing

• deceleration
• positive acceleration 

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NGSS.MS-PS3-1

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An object moving with constant velocity has (a)   because there is no ​ change .

• constant acceleration
• no acceleration
• a slow speed
• a faster speed

Objects moving with circular motion are ​ (a)   because direction is constantly changing

• velocitizing
• never accelerating
• mass

• constantly accelerating