Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics Aqa > 3.4.1 Mechanics > Flashcards

3.4.1 Mechanics Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

What is a scalar quantity?

A

A physical quantity with just magnitude

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is a vector quantity?

A

A physical quantity with both direction and magnitude

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What sort of quantity is distance?

A

Scalar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What sort of quantity is mass?

A

Scalar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What sort of quantity is temperature?

A

Scalar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What sort of quantity is speed?

A

Scalar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What sort of quantity is displacement?

A

Vector

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What sort of quantity is velocity?

A

Vector

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What sort of quantity is acceleration?

A

Vector

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What sort of quantity is weight?

A

Vector

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What sort of quantity is force?

A

Vector

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

When vectors are at a right angle to each other how can you add them? (2)

A

Pythagoras
Trigonometry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is a method of adding vectors which may have angles greater than 90 degrees?

A

Scale drawing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What does it mean when a force triangle is closed?

A

The forces are in equilibrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

With regards to motion, what does it mean when an object is in equilibrium? (2)

A

The object is at rest and not moving, or moving at a constant velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the moment of a force?

A

Force x the perpendicular distance from the line of action of the force to the point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What does coplanar mean?

A

Forces within the same plane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is couple?

A

A pair of equal and opposite coplanar forces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is a moment of a couple?

A

One of the forces x perpendicular distance between the lines of action of the forces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is the principle of moments?

A

For an object to be in equilibrium, all anticlockwise moments = all clockwise moments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is the centre of mass of an object?

A

The point which an objects mass acts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

If an object is uniform where is it’s centre of mass?

A

Exactly at the centre of the object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is speed defined as?

A

How fast an object is moving

24
Q

What is displacement defined as?

A

Distance travelled from the starting position

25
Q

What is velocity defined as?

A

The rate of change of displacement

26
Q

What is acceleration defined as?

A

The rate of change of velocity

27
Q

What is instantaneous velocity?

A

Velocity at a specific point in time

28
Q

How do you attain a instantaneous velocity on a non-linear displacement - time graph?

A

By drawing a tangent at a specific time and then calculating the gradient

29
Q

What is average velocity?

A

Velocity over a specified time

30
Q

How do you attain the average velocity over a period of time using a displacement - time graph?

A

By dividing the final displacement by time

31
Q

On an acceleration - time graph, how is uniform acceleration expressed?

A

A horizontal line

32
Q

On an acceleration - time graph, how is non-uniform acceleration expressed?

A

A non-horizontal line, usually still linear

33
Q

What does a displacement - time graph show?

A

Change in displacement overtime

34
Q

What does a velocity - time graph show?

A

Change in velocity overtime

35
Q

What does an acceleration - time graph show?

A

Change in acceleration overtime

36
Q

What is the area under an acceleration - time graph?

A

Change in velocity

37
Q

What is the area under a velocity - time graph?

A

Change in displacement

38
Q

What is the gradient of a displacement - time graph?

A

Velocity

39
Q

What is the gradient of a velocity - time graph?

A

Acceleration

40
Q

When using the SUVAT equations what must an object have?

A

Uniform acceleration

41
Q

RP: What is the equipment for the ‘determination of g’ experiment? (9)

A

Metre rule
Steel ball bearing
Two light gates
timer
clamp stand
clamps
electromagnet
counter weight
cushion

42
Q

RP: What is the independent variable (changing) for the ‘determination of g’ experiment?

A

Changing the distance between the light gates - h - metres

43
Q

RP: What is the dependent variable (measuring) for the ‘determination of g’ experiment?

A

Measuring the time taken for the ball to travel the distance between the light gates

44
Q

RP: What are the control variables (keeping the same) for the ‘determination of g’ experiment? (3)

A

Same ball bearing
same electromagnet
same height the ball is dropped from

45
Q

RP: Regarding the ‘determination of g’ experiment, what is the starting distance between the two light gates?

A

0.500m

46
Q

RP: Regarding the ‘determination of g’ experiment, how much is the distance between the light gates reduced for each new reading?

A

0.050m

47
Q

RP: Regarding the ‘determination of g’ experiment, how is the distance between the light gates reduced?

A

By moving up the lower light gate

48
Q

RP: Regarding the ‘determination of g’ experiment, to what is the minimum distance between the light gates that you measure?

A

0.250m

49
Q

RP: Regarding the ‘determination of g’ experiment, what is the method for the experiment? (7)

A

1.Measure the distance between the light gates
2.Reset the stopwatch
3.Turn on the electromagnet and attach the ball bearing
4.Turn off the electromagnet
5.Record the time
6.Reduce the distance between the light gates
7.Repeat

50
Q

RP: Regarding the ‘determination of g’ experiment, which SUVAT formula is used to plot the results?

A

s = ut + 1/2at^2
h = ut + 1/2gt^2

51
Q

RP: Regarding the ‘determination of g’ experiment, what are the axis for the results?

A

2h/t against t

52
Q

RP: Regarding the ‘determination of g’ experiment, what is the gradient of the graph which the results are plotted?

A

m = g

53
Q

RP: Regarding the ‘determination of g’ experiment, what are two hazards? (2)

A

Clamp stand
Ball bearing

54
Q

RP: Regarding the ‘determination of g’ experiment, what are the risks of the two hazards: Clamp stand and ball bearing?

A

Falling on someone

55
Q

RP: Regarding the ‘determination of g’ experiment, what are the actions that can be taken for the hazards: Clamp stand and ball bearing?

A

Counter weight (Clamp stand) and Cushion (ball bearing)

Physics Aqa (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions