Chapter 1.4 - Linear Motion.

Question 1

State the equation for velocity.

Answer 1

Velocity = Change in displacement / time.

Question 2

State the equation for speed.

Answer 2

Speed = Distance travelled / Time taken.

Question 3

You must be aware of the 4 SUVAT equations. Write what each variable stands for and the respective unit it has.

Answer 3

S - Displacement / m

U -Initial velcoity / ms^-1

V - Final velocity / ms^-1

A - Acceleration / ms^-2

T - Time / s

Question 4

State the equation for average speed.

Answer 4

Average speed = Total distance travelled / Time taken.

Question 5

Define average velocity.

Answer 5

Total displacement divided by time.

Question 6

State the equation for acceleration.

Answer 6

Acceleration = Change in velocity / time.

Question 7

Define acceleration.

Answer 7

The rate of change of velocity.

Question 8

Below is a motion graph.

1 - What type of graph is indicated.

2 - What does the gradient of the graph represent?

3 - Can you use an equation to verify your answer to part 2?

4 - Does the area under the graph represent something?

Answer 8

1 - This is a velocity time graph.

2 - The gradient represents acceleration.

3 - Yes, as a = Δv / Δt.

4 - Yes, the are represents the displacement (remember as s = v x t, i.e. the product of the area under the graph).

Question 9

Define displacement.

Answer 9

Distance in a specified direction.

Question 10

Define velocity.

Answer 10

The rate of change of displacement.

Question 11

State the 4 SUVAT equations required for your AS exam.

Answer 11

v = u + at

s = ½(u + v)t

s = ut + ½at²

v² = u² + 2as

Question 12

A motion graph is shown below.

1 - What type of graph is shown.

2 - What does the gradient of this graph represent?

3 - Is there an equation you can use to verify your answer to part 2?

4 - Does the area under the graph represent anything?

Answer 12

1 - This is a displacement time graph.

2 - The gradient represents velocity.

3 - Yes, v = Δs / Δt

4 - No.

Question 13

While using the SUVAT equations in projectile motion as well as freefall questions, there is a value you are never told in the question yet are expected to know it.

What is this quantity and state its respective value.

Answer 13

Acceleration due to gravity.

9.81 ms^-2

Question 14

Below is a graph you must be aware of.

1 - State the type of graph.

2 - What does the gradient of this graph represent?

3 - Is there an equation that can verify your answer to part 2?

4 - Does the area under this graph represent anything?

Answer 14

1 - This is a distance time graph.

2- The gradient represents speed.

3 - Yes, speed = d/t.

4 - No.