Physics Constant Acceleration Problems

Being told an object came to a stop tells you that which of these variables is zero?

• a
• vi
• vf
• t

Being told an object started from rest tells you that which of these variables is zero?

• a
• vi
• vf
• t

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

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

Billy was driving his car and when he reached the tollbooth he slowed down with an acceleration of -8.9 m/s² for 20 seconds. If he started with an initial velocity of 190m/s, what is his final veloctiy?

• -12 m/s

• 12 m/s

• 202 m/s

• -.93 m/s

A running horse increases his speed from 15 m/s to 42 m/s at an acceleration of 9 m/s². How long did this take the horse?

• 5 s

• 4 s

• 6 s

• 3 s

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 

A boat increases its speed from 16 m/s to 96 m/s in 5 seconds. What was its rate of acceleration?

• 10 m/s²

• 16 m/s²

• 14 m/s²

• 16 m/s

A bus traveling at 45 km/hr comes to rest in 0.005 hours. What is the acceleration?

• -9000 m/s²
• 9000 m/s²
• 0.01 m/s²
• -0.01 m/s²

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