Understanding Speed and Velocity

__________ is defined as the speed of an object in a given direction, or the displacement of the object divided by the time it took.

• Speed

• Distance

• Velocity

• Motion

A train covers 50 kilometers in the first hour, 50 kilometers in the second hour, and 50 kilometers in the third hour. Which of the following best describes this situation?

• Instantaneous speed

• Velocity

• Distance

• Constant speed

Which pair of measurements must include a direction?

• Speed & velocity

• Displacement & speed

• Velocity & displacement

• Slope & speed

An object travels 30 kilometers and then returns to its starting point. What is the distance the object traveled, and what is its displacement? (Choose the correct pair in the correct order.)

• 60 km; 0 km

• 60 km; 30 km

• 30 km; 0 km

• 30 km; 30 km

Which of the following would help you answer the question: "What was your speed at a particular moment in time?"

• Displacement

• Instantaneous speed

• Both displacement and velocity

• Velocity

If you're riding on a roller coaster at a steady speed, is your velocity changing?

• No

• Yes

Which of the following is the correct SI unit for both speed and velocity?

• inch/min

• m/s

• km

• mi/h

Which of the following does not describe a velocity? (Be careful!)

• 100 km/h heading east

• 20 m/s towards the forest

• 50 mi/h to the school

• 15 miles from the starting point

Which of the following is not a valid unit for measuring speed?

• m/s

• mi/h

• kg/s

• km/h

Tags

NGSS.MS-PS3-1

Choose all of the following that are scalar quantities:

• Displacement

• Speed

• Velocity

• Distance

• Time