8.2 Linear Motion

Question 1

What is speed?

Answer 1

Speed can be defined as the rate at which someone or something moves or is able to move.

Question 2

What is the scientific unit for speed?

Answer 2

m/s

Question 3

How is average speed calculated?

Answer 3

Average speed can be calculated by dividing the distance travelled by the time taken.

V=D/T

Question 4

What is m/s?

Answer 4

Metres per second

Question 5

What is distance?

Answer 5

The physical length of the displacement path travelled.

Question 6

What is displacement?

Answer 6

the straight line distance between the start point and the finish point.

Question 7

What is the speed in terms of measurement?

Answer 7

Speed is a measure of the rate at which distance is covered.
Speed is a scalar quantity, one that requires only a magnitude (kilometers per hour).

Question 8

What is the differences between distance and displacement?

Answer 8

Distance: The length of the actual path travelled by an object, scalar quantity, it cannot be zero
Displacement: The shortest distance travelled between initial point to final point of path travelled by an object, vector quantity, it can be zero.

Question 9

What is velocity in terms of measurement?

Answer 9

Velocity is a measure of the rate of change in position.
Velocity is a vector quantity, one that requires a magnitude (also km/h) and a direction.
Velocity measures displacement over time, as opposed to distance.

Question 10

What is displacement in terms of measurement?

Answer 10

Displacement is a measure of how far from the starting point an object ends up, similar to the colloquial, ‘as the crow flies.’