The SI unit for acceleration is

• mph

• ft/sec

• m/s²

• m/s

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NGSS.HS-PS2-1

A roller coasters accelerates from an initial velocity of of 6.0 m/s to a final velocity of 70 m/s over 4 seconds.  What's the acceleration?

• 24 m/s²
• 18 m/s²
• 16 m/s²
• 16 m/s

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NGSS.HS-PS2-1

A car starts from rest at a stop light and reaches 20 m/s in 3.5 s. Determine the acceleration of the car.

• 2.2m/s²
• 7.0m/s²
• 5.7m/s²
• 70m/s²

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NGSS.HS-PS2-1

Acceleration is the change in velocity with time: True or False

• True

• False

• True

• False

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NGSS.HS-PS2-1

What does the slope of this graph represent?

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NGSS.HS-PS2-1

Any change in speed and direction is called...

• acceleration

• action

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NGSS.HS-PS2-1

A positive acceleration means that your object is

• at rest

• speeding up

• moving

• slowing down

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NGSS.HS-PS2-1

A negative acceleration means that your object is  

• constant

• speeding up

• at rest

• slowing down

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NGSS.HS-PS2-1

Dorothy was initially at rest. She sped up to 9 m/s in 24 seconds. What was her acceleration?

• 2.7 m/s²

• -2.7 m/s²

• -0.375 m/s²

• 0.375 m/s²

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NGSS.HS-PS2-1