velocity

Which of the following are vector quantities?

Displacement & Velocity

Which of the following is a scalar quantity?

Distance & Temperature

Which is the best way to describe the average velocity of an object?

The change in displacement divided by the change in time

Which of the following units is the SI unit of velocity?

Meters per second

Magnitude describes the size of any measurement with a correct unit.

True

The speed of sound in air is roughly 1,484 m/s. How far, in meters, would a sound wave travel in 5 seconds? 

7420 meters

A dolphin swims for a distance of 10.0 km.  It travels at a speed of .99 km/min. How many minutes does this take?

10.1 mins

A cyclist travels 18 km east in 30 minutes. What is the cyclist's average velocity in m/s?

10 m/s east

A car travels at a constant speed of 25 m/s for 3 minutes. What distance does the car travel, expressed in kilometers?

4.5 km

Mr. R has one of his runners start at a position of 12 m and they finishes at 47m. What is the runner's displacement?

35 m

A skateboarder has an initial position of  -8 m and an overall displacement of 23 m. What is the skateboarder's final position?

15 m

Velocity is a vector

True

What quantity describes the difference between an object’s initial position and the object’s final position?

Displacement

You get up and walk 20 meters to the restroom. What is the magnitude of your displacement?

20

 

You get up and walk 20 meters to the restroom. You then walk 15 laps around the hall.  You then return to your original seated position.   What is the magnitude of your displacement?

0

A tree kangaroo climbs on a  branch 4 meters north and then moves along another branch 3 meters west. What is the magnitude of its displacement?

5

A shark travels at an average speed of 20 km/h along a 0.60 km straight segment. How much time does the shark take to travel this segment?

0.03 hrs

 

The following indicate a change in velocity

Driving in a circle at 20 mph & Slowing down your car for a traffic light & Speeding up to merge into a different lane