Acceleration Concepts

Acceleration is defined as the CHANGE in 

• time it takes for one place to move to another place. 
• velocity of an object.
• distance divided by the time interval 
• velocity divided by the time interval 

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The picture of the position vs. time graph shows an object that is...

• accelerating/speeding up
• moving at a constant speed 
• not moving 
• accelerating/slowing down. 

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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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In which of the following situations would a car be speeding up while traveling forward?

• positive velocity and positive acceleration

• positive velocity and negative acceleration

• negative velocity and positive acceleration

• negative velocity and negative acceleration

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An object that has increasing velocity while moving away from its starting position has __________ acceleration.

• negative

• zero

• positive

After 3 seconds an object that starts from rest and has an acceleration of 10.0 m/s/s has a final velocity of __________.

• 30 s

• 30 m/s

• 30 m

• 30 m/s/s

Indicate if the following statement is true or false. An object that is moving at constant speed can be accelerating.

• true

• false

Indicate if the following statement is true or false. An object that is moving in a circle at constant speed is experiencing acceleration.

• true

• false

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The slope of the line on a velocity-time graph represents the ___________ of an object.

• momentum

• speed

• velocity

• acceleration

A horizontal line on a velocity-time graph represents __________ acceleration.

• positive

• zero

• negative