Speed & Acceleration

Which graph represents zero acceleration (constant velocity)?

• A
• B
• C
• D

Which graph represents the greatest acceleration?

• A
• B
• C
• D

Match the description to the graph:

"The car is stopped."

• 
• 
• 

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 

Match the description to the graph:

"The car is traveling at a constant speed."

• 
• 
• 

A drag racer accelerated from 0 m/s to 200 m/s in 5 s.  What was the acceleration?

• 0 m/s
• 40 m/s²
• -40 m/s²
• 40 m/s

A car accelerates from a standstill to 70 m/s in 10 seconds.  What is the acceleration?

• 0.7m/s²
• 7m/s²
• 14m/s²
• none of the above

A dog runs with an initial speed of 7.5 m/s on a waxed floor.  It slides to a stop in 15 seconds.  What is the acceleration?

• -7.5 m/s
• -7.5 m/s²
• -0.5 m/s²
• 7.5 mi//hr

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. 

How can acceleration be zero?

• a car runs out of gas and slowly rolls to a stop
• a car decreases speed at a constant rate until it comes to rest
• car has constant speed and is traveling on a straight path
• the car travels round trip and is back at the starting point