Gr.10 T3 (Physics)

Question 1

What is acceleration?

Answer 1

The rate of change in velocity.

Question 2

Are the following vectors or scalars:

1. Acceleration
2. Velocity
3. Speed
4. Magnitude of something

Answer 2

1. Vector
2. Vector
3. Scalar
4. Scalar

Question 3

What is the formula of acceleration (in words)?

Answer 3

acceleration equals change in velocity divided by change in time

Question 4

What is instantaneous velocity?

Answer 4

A velocity at a specific time. The displacement divided by an infinitesimal time value.

Question 5

What is instantaneous speed?

Answer 5

Magnitude of the instantaneous velocity

Question 6

What does the gradient represent in a position-time graph?

Answer 6

Velocity

Question 7

What does a curved line represent in a position-time graph?

Answer 7

Acceleration

Question 8

What does the gradient represent in a velocity-time graph?

Answer 8

Acceleration

Question 9

What does the area underneath the line represent in a velocity-time graph?

Answer 9

Displacement

Question 10

What does a horizontal line mean in

1) a position-time graph
2) a velocity-time graph
3) a acceleration-time graph

Answer 10

1) object not moving
2) constant velocity, no acceleration
3) constant acceleration (positive or negative, depending on whether above or below the x-axis)

Question 11

What does the area beneath a line represent in an acceleration-time graph?

Answer 11

Average velocity

Question 12

What does stopping distance consist of?

Answer 12

Thinking distance+braking distance

Question 13

Note that doesn’t work for a key card…

Answer 13

When a question asks 
1. The magnitude of...
2. How far...
3. How fast...
The answer does not need a direction.