Speed and Velocity

A downhill skier was able to move 560 meters in 25 seconds. What is the skier's average speed? (Round your answer to the nearest tenth of a meter per second.)

22.4

Ben walks 500 meters from his house to the corner store. He then walks back toward his house but stops to talk to a neighbor when he is 200 meters from the corner store. If it takes Ben 910 seconds from the time he leaves his house until he stops to talk to his neighbor, what is his average velocity? (Round your answer to the nearest tenth of a meter per second.)

0.3

Which statements describe the motion of the object represented by the graph? Check all that apply.

A

D

E

The object represented by this graph is moving

toward the origin at a constant velocity.

The starting position of this object is

The object is traveling at a velocity of

3 and 3

Which runner had the fastest speed in the race?

Which runner had the slowest speed in the race?

Which runner had a head start?

A

C

C

Use the drop-down menus to complete each sentence.

car A

car C

cars A and B

Based on the graph, describe what is happening between 4 and 6 seconds.

The object is not moving.

Use the graph to determine the instantaneous speed at 2 seconds.

3 and 2

Use the graph to determine the velocity between 6 and 12 seconds.

-2 and 0

A 100-meter sprint is a race using only the straight side of a racetrack. A 400-meter sprint is a race that makes one complete lap around a racetrack. Why are velocity and speed the same for a 100-m sprint but not a 400-m sprint?

In the 100-m sprint, the displacement is 100 meters and the distance is 100 meters. This means speed and velocity are the same for the 100-m sprint. In the 400-m sprint, the distance is 400-m, but the runners stop at the same place they start so the displacement is zero. Zero displacement means zero velocity.