9.1

Question 1

Acceleration

Answer 1

the rate of change in velocity.

Question 2

If an object’s acceleration is in the same direction as its velocity, the oject’s speed

Answer 2

Increases

Question 3

If an object’s acceleration is in the opposite direction to it’s velocity, the object’s speed

Answer 3

Decreases

Question 4

Zero acceleration means

Answer 4

the object is moving at a constant velocity.

Question 5

To find a change in velocity

Answer 5

subtract the initial velocity () from the final velocity ().

Question 6

North, east, up and right are considered

Answer 6

Positve

Question 7

south, west, down and left are

Answer 7

Negative

Question 8

Steps you MUST show when solving problems to earn full marks:

Answer 8

Notice how the generic equation is given.
Then the variables are plugged in.
Lastly, the calculate in made. The final answer includes units and it made bold.

Question 9

Acceleration

Answer 9

the rate at which the velocity of a moving object changes

Question 10

A change in the velocity can be

Answer 10

a change in either speed or direction.

Question 11

Zero acceleration

Answer 11

hat the object is not changing velocity. This could mean the object is at rest, or it could mean the object is moving with a constant velocity.