Biomechanics: Measurements used in linear motion

Question 1

Define scalar quantity

Answer 1

When measurements are described in terms of just their size or magnitude. Direction is not taken into account. (Examples include: Mass, Speed, Distance)

Question 2

Define speed

Answer 2

The rate of change of position

Question 3

What calculation is used to measure speed?

Answer 3

Speed in metres per second (m/s)=(Distance covered in metres (m))/(Time taken in seconds (s))

Question 4

Define distance

Answer 4

The length of the path a body follows when moving from one position to another

Question 5

What calculation is used to measure distance?

Answer 5

Distance (m) = Speed in metres per second (m/s) × Time taken in seconds (s)

Question 6

On a time/distance graph, what does a horizontal line indicate?

Answer 6

That an object is stationary

Question 7

On a time/distance graph, what does a straight but angled line indicate?

Answer 7

That an object is moving at a steady speed

Question 8

On a distance/time graph, what does a steep line indicate

Answer 8

The object is moving quickly