Speed and Velocity

Speed is calculated by taking _ divided by time.

distance

Jamal was riding his bike home at a speed of 12 mph. On his trip out, he had traveled 8 miles away from his house. He has been traveling for a half hour at this speed. How far away from home is he?

2 miles

The chart shows Daniela's run through her race. What is her velocity?

2.5 m/s

Holden is trying to determine the velocity of his race car. He went 20 meters east, turned around, and went 40 meters west. He turned the car one more time and went 35 meters east. His car was 15 meters from the starting line. This took 5 seconds. What is the car's velocity?

3 m/s east

Which is a valid velocity reading for an object?

45 m/s north

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 velocities, while 8.1 km/h northwest is the average velocity.

The graph is the path Beth took on a walk. What does the line from time 6 to 10 indicate?

Beth went back toward her origin.

Which explains the information needed to calculate speed and velocity?

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

The chart shows the movement of a ball after several seconds. Column A is on the x-axis, and Column B is on the y-axis. Which titles should replace A and B?

Column A should be "Time," and Column B should be "Position."

The graph shows two runners participating in a race. Which best describes the runners?

Daniela had a 5 meter head start, and Leonard caught up to her at 25 meters.

The graph indicates the running route for Tobias. Which best describes his run?

From time 6 to 10, he was at his slowest.

The chart indicates the time, speed, and velocity of five runners. Which best describes the runners?

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

Lila is a track and field athlete. She has to complete four laps around the track, which is 400 meters. The race took her 6 minutes to complete. Which best describes her speed and velocity?

Her speed is 4.4 m/s, and her velocity is 0 m/s.

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 instantaneous speed of the bike rider.

_ is the displacement of an object during a specific unit of time.

Velocity

Which best defines the relationship between speed and velocity?

Velocity is speed with displacement.

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

Which units are used to measure both velocity and speed? Check all that apply.

m/s km/h mph

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 direction

Which formulas might be used to find the velocity based on a position-time graph? Check all that apply.

y2 - y1 x2 - x1 y2 - y1/x2 - x1