Acceleration Concept

initial v=5 m/s, final v=0 m/s, time is 20 seconds, what is a (acceleration)

• (0-5)/20
• (5-0)/20
• 5/20
• 20/(5-0)

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NGSS.HS-PS2-1

Acceleration only takes place when things speed up. 

• True
• False

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NGSS.HS-PS2-1

Acceleration is defined as the CHANGE in 

• time of motion to another place. 
• velocity 
• distance 
• speed

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NGSS.HS-PS2-1

Changes in our speed, direction  or both are called _________.

• gravity
• changes
• acceleration
• deceleration

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NGSS.HS-PS2-1

When are you undergoing an acceleration in a car? 

• speed up
• slow down
• make turns
• All of the above 

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NGSS.HS-PS2-1

In each of the following cases, determine which car has the greatest positive acceleration?

• starts from 0m/s to 20m/s in 4 seconds.
• speed up from 20m/s to 40m/s in 3 seconds
• slow down from 50m/s to stop in 2 seconds
• starts from 0 m/s to 20m/s in 5 seconds

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NGSS.HS-PS2-1

Why does a car accelerate as it round a corner at a constant speed?

• Its direction changes
• It doesn't
• It slows down
• Its speeds up  

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NGSS.HS-PS2-1

Acceleration is defined at a change in velocity. Velocity is ______ 

• Speed and direction 
• The same thing as speed
• distance/time
• time/distance 

Determine the motion of the car.

• at rest 
• moving at constant speed
• speeding up
• slowing down

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NGSS.HS-PS2-1

Determine the motion of the car.

• at rest 
• constant velocity 
• speeding up
• slowing down

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NGSS.HS-PS2-1