Speed and Velocity

Which best defines the relationship between speed and velocity?

• Speed is velocity with displacement.

• Velocity is speed with displacement.

• Speed is based on a specific direction.

• Velocity is based on distance.

Kiley went 5.7 km/h north and then went 5.8 km/h west. From start to finish, she went 8.1 km/h northwest.

Which best describes her numbers?

• 5.7 km/h north and 5.8 km/h west are instantaneous speeds, while 8.1 km/h northwest is the average speed.

• 5.7 km/h north and 5.8 km/h west are average speeds, while 8.1 km/h northwest is the instantaneous speed.

• 5.7 km/h north and 5.8 km/h west are average velocities, while 8.1 km/h northwest is the instantaneous velocity.

• 5.7 km/h north and 5.8 km/h west are instantaneous velocities, while 8.1 km/h northwest is the average velocity.

Mr. Smith is designing a race where velocity will be measured. Which course would allow velocity to accurately get a winner?

• a 5 mile course from the center of town heading north to the outskirts of town

• a 100 meter swim in a 50 meter pool

• a 2 mile run around a 400 meter track

• a 10 mile bike course that zigzags through the mountains and back again

Greg is in a bike race. At mile marker four (out of ten), his speed was measured at 13.5 mph.

Which best describes the measured number?

• It is the average speed of the bike rider.

• It is the instantaneous speed of the bike rider.

• It is the instantaneous velocity of the bike rider.

• It is the average velocity of the bike rider.

Which explains the information needed to calculate speed and velocity?

• Both require the total distance, but velocity also requires time and displacement.

• Both require time, but velocity requires displacement and speed requires distance.

• Speed requires displacement, while velocity requires distance.

• Speed does not require time, while velocity does require time.

Which units are used to measure both velocity and speed? Select three options.

• m/s

• d/t

• km/h

• mph

• lph

Tags

NGSS.MS-PS3-1

Which is a valid velocity reading for an object?

• 45 m/s

• 45 m/s north

• 0 m/s south

• 0 m/s

Which best describes the runners?

• Garreth and Elisa ran the same distance but not the same displacement, Luigi and Jasmine went the same displacement, and Logan ran faster than Jasmine.

• Garreth ran farther than Luigi, Elisa and Jasmine went the same distance, and Logan and Jasmine has the same displacement in the opposite direction.

• Garreth and Elisa ran together, Luigi and Jasmine went the same distance, and Logan and Jasmine have the same displacement in the opposite direction.

• Garreth ran less than Logan, Elisa and Jasmine went the same displacement, and Luigi and Garreth ran together.

Tags

NGSS.MS-PS3-1

Veronica’s velocity was measured as 4.3 m/s. She displaced 20 meters in 4.7 seconds. Which piece of information is missing for the correct calculation of velocity?

• the starting point

• the direction

• the end point

• the time per meter

Jamal is 8 miles away from his house. He rides his bike home toward home at a speed of 12 mph..

How far away from home is he after a half hour?

• 1 mile

• 2 miles

• 3 miles

• 4 miles