Module 6

Question 1

Reference point

Answer 1

A point against which
direction is measured

Question 2

Displacement

Answer 2

The distance an object travels plus the direction from the starting point

Question 3

Vector quantity

Answer 3

A physical measurement that contains both magnitude (number) and directional information

Question 4

Scalar quantity

Answer 4

A physical measurement that contains only magnitude (number) and does not contain directional information

Question 5

Average speed

Answer 5

The ratio of the total distance traveled to the total time of the trip

Question 6

Instantaneous speed

Answer 6

The rate at which an object is moving at a given moment in time

Question 7

When objects travel in the same direction, their relative speed is

Answer 7

the difference between their
individual speeds. (relative speed = speed of object 1 - speed of object 2)

Question 8

When objects travel in opposite directions, their relative speed is

Answer 8

the sum of their individual
speeds. (relative speed = speed of object 1 + speed of object 2)

Question 9

Acceleration

Answer 9

The time rate of change of an object’s velocity