SP1 Motion

Question 1

What are vectors?

Answer 1

Quantities with magnitude and direction

Question 2

What are scalars?

Answer 2

Quantities with magnitude only

Question 3

Is force a vector or scalar?

Answer 3

Vector

Question 4

Is velocity a vector or scalar?

Answer 4

Vector

Question 5

Is displacement a vector or scalar?

Answer 5

Vector

Question 6

Is weight a vector or scalar?

Answer 6

Vector

Question 7

Is acceleration a vector or scalar?

Answer 7

Vector

Question 8

Is momentum a vector or scalar?

Answer 8

Vector

Question 9

Is speed a vector or scalar?

Answer 9

Scalar

Question 10

Is distance a vector or scalar?

Answer 10

Scalar

Question 11

Is mass a vector or scalar?

Answer 11

Scalar

Question 12

Is energy a vector or scalar?

Answer 12

Scalar

Question 13

Is temperature a vector or scalar?

Answer 13

Scalar

Question 14

Is time a vector or scalar?

Answer 14

Scalar

Question 15

Distance vs Displacement

Answer 15

Distance: how far an object has moved. Scalar quantity.

Displacement: the distance and direction in a straight line from an object’s start-finish point. Vector quantity.

Question 16

What is your distance and displacement if you walk 5m north then 5m south?

Answer 16

Distance travelled = 10m
Displacement = 0m

Question 17

Speed vs Velocity

Answer 17

Speed: how fast you are going e.g. 30mph. Scalar quantity.

Velocity: speed in a given direction e.g. 30mph north. Vector quantity.

Question 18

Typical walking speed =

Answer 18

1.4 m/s

Question 19

Typical running speed =

Answer 19

3m/s

Question 20

Typical cycling speed =

Answer 20

5.5m/s

Question 21

Typical speed of cars in a built up area =

Answer 21

13m/s

Question 22

Typical speed of cars on a motorway =

Answer 22

31m/s

Question 23

Typical speed of aeroplanes =

Answer 23

250m/s

Question 24

Typical speed of trains =

Answer 24

55m/s

Question 25

Typical speed of ferries =

Answer 25

15m/s

Question 26

Typical wind speed =

Answer 26

5-20m/s

Question 27

Typical speed of sound in air =

Answer 27

340m/s

Question 28

Speed (m/s) = s =

Answer 28

Distance (m) / Time (s) d / t

Question 29

Methods of measuring speed (by measuring distance and time):

Answer 29

1. Stop watch and metre rule best for distances less than 1m and times greates than 5s 2. Light gates best option for short time intervals get rid of human error caused by reaction times 3. Roling tape measure (the clicky wheel things) use this + markers to measure and mark out distances can be used to measure lartge distance and times like walking speed 4. Video recording see how far an object travels per frame if you know how many frames per second the camera records you can find the distance travelled by the object in a given number of frames and the time it takes to do so

Question 30

What is acceleration?

Answer 30

The rate of change of velocity

Question 31

Acceleration (m/s²) = a =

Answer 31

Change in velocity (m/s) / Time (s) (v - u) / t

Question 32

What is negative acceleration also called?

Answer 32

Deceleration (if something slows down, the change in velocity is negative)

Question 33

Acceleration due to gravity =

Answer 33

10m/s²

Question 34

Formula for constant acceleration:

Answer 34

Final velocity² (m/s) - Initial velocity² (m/s) = 2 x Acceleration (m/s²) x Distance (m) v² - u² = 2ax

Question 35

On a Distance/Time graph, what does an uphill section represent?

Answer 35

Steady Speed If it is steeper, it is going faster

Question 36

On a Distance/Time graph, what does a flat line represent?

Answer 36

Stopped

Question 37

On a Distance/Time graph, what does a curve getting steeper represent?

Answer 37

Acceleration

Question 38

On a Distance/Time graph, what does a curve levelling off represent?

Answer 38

Deceleration

Question 39

What does the gradient of a Distance/Time graph represent?

Answer 39

Speed (because d/t = s)

Question 40

Calculating the gradient (and thus speed) of a Distance/Time graph: If the line is straight vs curved:

Answer 40

Straight: speed = gradient = change in y/change in x = d/t Curved: Draw a tangent to the curve at the point you want to know, pick 2 points along the tangent, then do change in distance/change in time

Question 41

On a Velocity/Time graph, what does an uphill section represent?

Answer 41

Constant acceleration

Question 42

On a Velocity/Time graph, what does a flat line represent?

Answer 42

Steady Speed

Question 43

On a Velocity/Time graph, what does an uphill curve represent?

Answer 43

Increasing acceleration

Question 44

On a Velocity/Time graph, what does a downhill section represent?

Answer 44

Constant deceleration

Question 45

What does the gradient of a Velocity/Time graph represent?

Answer 45

Acceleration (Δv/t = a)

Question 46

What does the area under the graph of a Velocity/Time graph represent?

Answer 46

Distance travelled