1 Movement and position

Question 1

What kind of journey do distance-time graph represent?

Answer 1

An object travelling on a straight line.

Question 2

Which axis is distance on?

Answer 2

y.

Question 3

Which axis is time on?

Answer 3

x.

Question 4

What does this represent?

Answer 4

Acceleration.

Question 5

What does this represent?

Answer 5

Stationary.

Question 6

What does this represent?

Answer 6

Deceleration.

Question 7

What does this represent?

Answer 7

It has a negative gradient - it is travelling to the place where it first came from.

Question 8

What does this represent?

Answer 8

Constant speed.

Question 9

How do we find out the speed?

Answer 9

Using the gradient.

Question 10

How do we find the gradient?

Answer 10

Distance travelled / time taken

Question 11

What are the steps we take to find out the speed on a curved line?

Answer 11

• Put a dot on the speed that you want to find.
• Draw a tangent (should be as large as we can make it)
• Find the gradient (rise/run).

Question 12

How do you calculate average speed (v)?

Answer 12

Distance moved / time taken

Question 13

What is the triangle for average speed?

Answer 13

Question 14

What is displacement?

Answer 14

The distance moved in a straight line, in a given direction, from the starting point.

Question 15

How do you investigate the motion of everyday objects such as toy cars or tennis balls?

Answer 15

• Put a toy car on a table with a pulley at the end of the table.
• The toy car and slotted masses should be attached to the pulley with a string
• Time stop watch as the car moves.
• Repeat the experiment with different distances (0.2m, 0.4m, 0.6m)
• Repeat each distance at least three times to obtain 3 sets of timings.
• Get an average of the time and plot a graph.
• S = D / T

Question 16

What is the equation used for acceleration?

Answer 16

Acceleration = final velocity - initial velocity /
time taken

Question 17

What is the triangle for the equation for acceleration?

Answer 17

Question 18

How do you use the equation for acceleration as deceleration?

Answer 18

Initial velocity: 0
Final velocity: x
Time taken: y

Question 19

How can we tell that an object is accelerating when it is moving through timed intervals?

Answer 19

The distance travelled in equal time intervals increased, showing that the object was travelling faster as time passed.

Question 20

What is non-uniform acceleration?

Answer 20

It means that it’s not steady as it changes from instant to instant.

Question 21

What do velocity-time graphs show?

Answer 21

How an objects velocity changes over time.

Question 22

Which axis is velocity on a velocity-time graph?

Answer 22

y

Question 23

Which axis is distance on a velocity-time graph?

Answer 23

x

Question 24

What tells you the acceleration on a velocity-time graph?

Answer 24

The gradient.

Question 25

What does this represent?

Answer 25

The rate of acceleration is increasing.

Question 26

What does this represent?

Answer 26

Constant acceleration.

Question 27

What does this represent?

Answer 27

Constant deceleration.

Question 28

What does this represent?

Answer 28

Constant velocity.

Question 29

What is constant velocity?

Answer 29

There is no acceleration (Isn't decreasing or increasing).

Question 30

How do you find the velocity when the line is flat?

Answer 30

You look at the corresponding number on the y-axis.

Question 31

How do you find the distance travelled on a v-t graph?

Answer 31

The area under the graph (line).

Question 32

How do you find out the average velocity?

Answer 32

Initial velocity + Final velocity / 2

Question 33

What is the equation of uniformly accelerated motion?

Answer 33

v^2 = u^2 + 2as

Question 34

What is the initial velocity?

Answer 34

It is the velocity at which the object possesses a tthe start. = 0

Question 35

What is the final velocity?

Answer 35

Measures the speed and direction of a moving body after it has reached its maximum acceleration.