Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Physics paper 2 > forces > Flashcards

forces Flashcards

(94 cards)

Start Studying
1
Q

What are examples of scalar quantities?

A

Mass
Temperature
Speed
Distance

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

What do scalar quantities only have?

A

Scalar quantities have magnitude(size) only.

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

What are examples of vector quantities?

A

Weight
force
velocity
acceleration

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

What do vector quantities have?

A

Vector quantities have magnitude and an associated direction.

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

How can we represent vectors?

A

By arrows

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

When representing vectors, what does the length of the arrow represent?

A

The magnitude of the vector.

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

When representing vectors, what does the direction of the arrows represent?

A

The direction of the vector.

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

What is the definition of force?

A

A push or pull that acts on a object due to the interaction with another object.

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

Why is force a vector quantity?

A

It has both magnitude and direction.

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

What unit for force?

A

(N) newtons

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

What is contact force?

A

When the 2 objects are physically touching.

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

What are examples of contact force?

A

friction
air resistance
tension
normal contact force

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

When can normal contact force only happen?

A

When the 2 objects are in direct contact with each other.

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

What is non-contact force?

A

When the 2 objects are physically separated

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

What are examples of non-contact force?

A

gravitational force
electrostatic force
magnetic force.

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

What is the definition for weight?

A

the force acting on an object due to gravity

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

What is the unit for weight?

A

(N) Newtons

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

What is the definition of mass?

A

The mass tells us how much matter an object has in it

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

What is the unit for mass?

A

Kg

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

Is mass a scalar or vector quantity?

A

Scalar quantity because it has no direction.

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

Why does the mass of an object NOT depend on?

A

Where the object is.

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

What is the definition of gravitational field strength?

A

The measure of the force of gravity in a particular location.

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

What is gravitational field strength measured in?

A

N/Kg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is the weight of a object directly proportional to?

A

the weight of a object directly proportional to the mass of an object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
How can we measure weight?
calibrated spring-balance (a newton meter)
26
What does the gravitational field strength depend on?
Where you are.
27
Where does the weight act on?
The weight of an object may be considered to act at a single point referred to as the object’s ‘centre of mass’.
28
What is the definition of a resultant force?
Multiple forces on an object can be replaced by one force that has the same effect.
29
What is the formula for resultant force?
Subtract smaller force from the larger force.
30
In free body diagrams, how is the object presented as?
as a point
31
What is the definition of work?
Whenever a force is used to move an object, energy is transferred.
32
What is work measured in?
Joules
33
When is 1 joule of work done?
One joule of work is done when a force of one newton causes a displacement of one metre.
34
What does 1 newton metre =?
1 newton metre = 1 J
35
What is the energy store for moving objects?
A moving object has a kinetic energy store.
36
What is an elastic material?
Elastic material will always return to it's original length or shape if we take away the forces acting on them.
37
What happens when we stretch inelastic material?
They do not return to their original length or shape when the forces are removed.
38
What is a good example of inelastic material?
Polymers
39
What is the spring constant measured in?
N/m
40
What do we have to replace in the Hooke’s Law equation for figuring out the compression?
E (extension) to compression
41
What is the definition of distance?
How far an object moves
42
What type of quantity is speed?
Scalar
43
What are the factors of speed that a person walks, run or cycle depends on?
age, terrain, fitness and distance travelled
44
What is the typical speed for walking?
walking ̴ 1.5 m/s
45
What is the typical speed for running?
running ̴ 3 m/s
46
What is the typical speed for cycling?
cycling ̴ 6 m/s
47
What is the typical speed for cars on the main road?
13m/s
48
What is the typical speed for a fast train in the uk?
50m/s
49
What is the typical speed for a cruising aeroplane?
250m/s
50
What is the typical speed of sound in the air?
330m/s
51
On what type of days does sound travel faster?
Sound travels faster on warmer days then cooler days.
52
What is the definition of velocity?
The velocity of an object is its speed in a given direction
53
What type of quantity is speed?
Scalar
54
What happens when an object is moving at a constant speed in a circle?
Then the velocity is constantly changing even though its speed is constant.
55
If an object is moving in a straight line the how can we represent the distance travelled?
Represent by a distance-time graph
56
What does the gradient of a distance-time graph tell us?
the gradient of a distance-time graph tell us about the objects speed
57
How do we calculate the gradient in a distance-time graph?
distance travelled/time taken
58
How do we calculate the speed of the distance time graph with a sloping curve?
By a tangent (same as in chemistry paper 2)
59
What is the definition of acceleration?
The accelaration of an object tells us the change in velocity over time?
60
What does displacement tell us?
The distance that an object moves in a straight line from the start point to a finish point with a direction.
61
What is the typical normal walking speed?
1.5m/s
62
What is the typical running speed?
3m/s
63
What is the typical cycling speed?
6m/s
64
What is the typical speed for a car on the main road?
13m/s
65
What is the typical speed for a fast train in the uk?
50m/s
66
What is the typical speed for a cruising aeroplane?
250m/s
67
What is the typical speed of sound in air?
330m/s
68
What type of days does the speed of sound in air travel faster?
Warmer days
69
What is the definition of velocity?
The velocity of an object is its speed with a given direction
70
What happens when an object moves at a constant speed in a circle?
Then it's velocity is constantly changing even though it's speed is constant. That includes moving part of a circle or a corner.
71
How can we represent the distance travelled with an object moving along a straight line?
A distance time graph
72
What does the gradient of the distance time graph tell us?
It's speed
73
How do we calculate the gradient of a distance time graph?
gradient = distance travelled/time taken
74
How do we find a gradient on a distance time graph with a curve?
Tangent - with formula
75
What is the definition of acceleration?
Tell us the change in velocity for an object over a given time
76
What is acceleration measured in?
m/s²
77
What is change in velocity measured in?
m/s
78
What does the gradient of a velocity time graph tell us?
acceleration of an object
79
How do we calculate the velocity in a velocity time graph?
Acceleration= change in velocity ------------------------- time taken ​
80
What does the total area on a velocity time graph tell us?
the distance travelled in a specific direction (displacement)
81
If an object is accelerating at a constant rate, what equation do we use?
v² - u² = 2as 2X a = acceleration (m/s²) s = distance travelled (m)
82
What is the acceleration when an object falls towards the surface of Earth?
9.8m/s²
83
What is the definition of terminal velocity?
Terminal velocity is the maximum speed an object falls at when the forces are balanced and it stops accelerating.
84
How can you have a lower terminal velocity?
You experience a greater force of friction due to your shape
85
What is newtons first law of motion?
If the resultant force of a stationary object is zero, then the object will remain stationary. If the resultant force acting on a moving object is zero, then the object will continue moving in the same direction at the same speed (with the same velocity)
86
What is newtons second law of motion?
The acceleration of an object is proportional to the resultant force acting on the object and inversely proportional to the mass of the object.
87
What is the definition of inertia mass?
Inertia mass basically means the mass of an object related to how hard it is to change its motion. The bigger the mass, the more inertia it has.
88
What is Newtons third law of motion?
Whenever two objects interact, the forces they exert on each other are equal and opposite
89
What is the definition of stopping distance?
the total distance travelled from when the driver first spots the obstruction to when the car stops.
90
How can we separate the 2 stopping distances into?
Thinking distance/braking distance
91
The greater the stopping distance..
the greater the speed
92
What is the first key fact about momentum?
All moving objects have momentum. But if an object is not moving then its momentum is zero.
93
What is momentum measured in?
(kg·m/s)
94
What is the definition of conservation of mass in a closed system?
In a closed system, the total momentum before an event is equal to the total momentum after an event.

Physics paper 2 (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions