Speed and Velocity and Scalar/Vector

1) You want to challenge Hein’s dog, Charlie in a race. You don’t want to lose, however, so you want to calculate how fast you’ll have to run. If Charlie can run 30 meters in 25 seconds, what is her speed?

• 0.83 m/s; scalar

• 0.83 m/s; vector

• 1.2 m/s; scalar

• 1.2 m/s; vector

2) A motorcyclist rides his bike 147 miles northeast during a road trip. If he spent 2.30 hours on his bike, what was his velocity?

• 63.91 mph northeast; vector

• 63.91 mph; scalar

• 0.016 mph; scalar

• 0.016 mph northeast; vector

3) You and your cousin jog 1600 m in 434 seconds. What is the average speed for your run?

• 3.69 m/s; vector

• 3.69 m/s; scalar

• 0.27 m/s; vector

• 0.27 m/s; scalar

4) A surfer catches the perfect wave and she hangs on for 35 seconds before falling into the ocean. If she covered 155 m during this time, what was her speed during this trip?

• 0.23 m/s; scalar

• 0.23 m/s; vector

• 4.43 m/s; scalar

• 4.43 m/s; vector

5) What is the average speed of a cheetah that sprints 100 m in 4 s?

• 25 m/s; vector

• 0.04 m/s; vector

• 0.04 m/s; scalar

• 25 m/s; scalar

6) A runner sprints 400 m west in a time of 58.0 s. What was the runner’s average velocity?

• 6.90 m/s west; vector

• 6.90 m/s; scalar

• 0.15 m/s; scalar

• 0.15 m/s west; vector

7) A roller skater travels 10 m north and then skates south for 4 m all within 20 seconds. What was the skater’s velocity? **Find displacement first**

• 0.7 m/s north; vector

• 0.3 m/s north; vector

• 0.7 m/s south; vector

• 0.7 m/s south; vector

8) The flash covers a distance of 5200 kilometers in 3.1 mins. What is the average speed of the flash (in km/min)?

• 1677.4 km/min; vector

• 0.0006 km/min; scalar

• 1677.4 km/min; scalar

• 0.0006 km/min; vector