1. Physical quantities can be categorised as either scalar or vector.

a) Describe what is meant by a scalar quantity.

b) Describe what is meant by a vector quantity.

c) Sort the following into a table with the headings scalar quantity and vector quantity.
force distance displacement velocity speed time

 

2. During a race, a car makes 25 complete laps of a course of 5 km.

a) What is the total distance travelled by the car after 25 complete laps?

b) What is the resultant displacement of the car after 25 complete laps?

 

3. An athlete runs 8 km due west then turns and runs 6 km due north as shown in the diagram.

a) What is the total distance that the athlete travelled?

b) By scale diagram or otherwise, find the resultant displacement of the athlete.

c) The run was completed in 75 minutes.

(i) Calculate the average speed of the athlete in km/h.

(ii) Calculate the average velocity of the athlete in km/h.