Velocity and Acceleration

1. Which of the following statements about speed and velocity is correct?

• Velocity only describes an object’s rate of motion.
• Speed describes how an object is changing its velocity.
• Speed and velocity both describe how an object is speeding up.
• Only velocity includes the direction an object is traveling.

Acceleration describes how an object’s velocity is changing.  Which of the following scenarios provides the best example of an accelerating object?

• A car driving at a constant speed
• A book sitting on top of a high shelf
• A toy train traveling in a circle
• A toy boat floating in a bathtub

When a car goes around a corner at 20 mph, why do we say it  accelerates?

• The car is accelerating because of the velocity is constant
• The car accelerates because it's going 20 mph
• Cars always accelerate when they are in motion
• The car is accelerating because it's changing direction

The gees fly 23 mph to the south when they migrate for the winter. 

• speed
• velocity
• acceleration

The tornado is traveling northwest at 20 mph. 

• speed
• velocity
• acceleration

The Olympian swam 200 meters in 20 seconds. 

• speed
• velocity
• acceleration

Avery likes to walk 30 feet in 10 seconds. What is her speed?

• 3 feet/sec
• 6 feet/sec
• 10 feet/sec
• 2 feet/sec

What is velocity?

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

What is velocity?

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

Which of the following is a unit for acceleration?

• km/s
• m/s²
• mi/hr
• ft