Acceleration

Acceleration: is the rate of change in ___________.

• speed
• distance
• velocity 
• displacement 

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

• 24 m/s²

• 18 m/s²

• 16 m/s²

• 16 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

The SI unit for acceleration is

• mph
• ft/sec²
• m/s²

When are you undergoing an acceleration in a car? 

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

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. 

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 

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  

Acceleration only takes place when things speed up. 

• True
• False

Which graph shows the object standing still?

• A
• B
• C
• D