Answers WA-Physical Science BSpeed and Velocity

Speed and Velocity — Unit test Answers

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How is speed calculated?

multiply velocity by displacement

divide velocity by displacement

multiply distance by time

divide distance by time

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The graph shows two runners participating in a race.

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

Daniela ran faster than Leonard through the entire race.

Daniela gave Leonard a 5 meter head start and caught up to him at 25 meters.

Daniela ran slower than Leonard, but she went faster at the end.

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

4 m/s east

4 m/s west

12 m/s west

12 m/s east

Which is a valid velocity reading for an object?

45 m/s

45 m/s north

0 m/s south

0 m/s

Which units are used to measure both velocity and speed? Select three options.m/sd/tkm/hmphm2

m/s

d/t

km/h

mph

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

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 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.

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

The chart shows Daniela’s run through her race.

1.5 m/s

2 m/s

2.5 m/s

5 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 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 statement can be supported by using a position-time graph?

A negative slope results when an individual is moving away from the origin.

A horizontal line on the graph means the individual is moving at a non-zero velocity.

A positive slope results when an individual is moving away from the origin.

The speed of an individual cannot be determined from this type of graph.

The chart indicates the time, speed, and velocity of five 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.

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.

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

Lila is a track and field athlete. She must complete four laps around a circular track. The track itself is a 400 meter track and it took her 6 minutes total to complete.Which best describes her speed and velocity? (There are 60 seconds in 1 minute.)

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

Her speed is 1.1 m/s, and her velocity is 0 m/s.

Her speed is 0 m/s, and her velocity is 2400 m/s.

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

The chart shows the movement of a ball after several seconds.

Column A should be “Time,” and Column B should be “Position.”

Column A should be “Position,” and Column B should be “Time.”

Column A should be “Velocity,” and Column B should be “Speed.”

Column A should be “Speed,” and Column B should be “Velocity.”

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

From time 0 to 6, he went fast and then slowed down.

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

From time 12 to 14, he went very slow.

From time 14 to 18, he went toward the starting point.

The graph is the path Beth took on a walk.

Beth slowed down considerably.

Beth turned around and went the other direction.

Beth sped up considerably.

Beth went farther away from the origin.

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Speed and Velocity — Unit test Answers

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