Speed and Velocity

A runner races in the 100 meter dash.  It takes her 10 seconds to finish.  What is her average speed?

• 10 m/s
• 1000 m/s
• 100 seconds
• 10 seconds

Velocity is both ____ and _____.

• speed , direction

• direction, mass

• volume, density

• numbers, direction

Which of the following represents a velocity?

• 40 m
• 40 m north
• 40 m/s
• 40 m/s north

What is the speed of a cheetah that travels 112.0 m in 4.00 s?

• 0.0357 m/s

• 448 m/s

• 0 m/s

• 28 m/s

Two horses are running in a field.  The gray horse runs 12 m/s north.  The black horse runs 12 m/s east.  
Which is true about their motions?

• Equal speeds.
• Equal velocities.
• Equal distances.
• Equal displacements.

How do you calculate average velocity?

• Distance divided by time.
• Displacement divided by time.
• Speed multiplied by time.
• Displacement divided by velocity.

A car moves a distance of 1000 m with an average speed of 28 m/s.   Calculate the time.

• 36 seconds
• 28,000 seconds
• 28 seconds
• 0.028 seconds

Cesar drove from Houston to Dallas in 4 hours. Dallas is roughly 250 miles NW of Houston. What was his average speed?

• 1000 mph

• 62.5 mph

• 55 mph

• 0.016 mph

Runner A ran 12 miles in 4 hours and Runner B ran 9 miles in 3 hours. Which runner had the greatest average speed?

• Runner A

• Runner B

• Both runners had the same average speed.

A baseball is thrown a distance of 20 meters. What is its speed if it takes 0.5 seconds to cover the distance?

• 40 m/s

• 10 m/s

• 0.025 m/s

• 0 m/s