A7.6-4 Quiz: Acceleration

Which of the following is a unit for acceleration?

• km/s
• m/s²
• mi/hr
• ft

What is velocity?

• the quickness of an object
• the location of an object
• acceleration
• speed in a specific direction

When a car goes around a corner at 20 mph, why do we say it  accelerates? (Hint: Velocity is a speed with direction, and Acceleration is defined as any change in velocity)

• The car accelerates because it's going 20 mph
• The car is accelerating because it's changing direction

A value that only has magnitude (a number)

• Scalar
• Vector
• Speed
• Velocity

Of the following, which is a vector?

• Mass
• Time
• Speed
• Velocity

Acceleration only takes place when things speed up. 

• True
• False

In each of the following cases, determine where the car has no acceleration ?

• A car shortly after a stoplight turns green.
• A car approaching a red light
• A car with the cruise control set at 80 km/h
• A car turning a curve at a constant speed

A roller coasters accelerates from an initial velocity 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

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

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

• 40 m/s²
• -40 m/s²
• 40 m/s