Brainscape's Knowledge GenomeTM

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


See full index

IGCSE Physics > 1 Motion > Flashcards

1 Motion Flashcards

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

Average speed equation

A

Average speed = total distance / total time

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

Average acceleration equation

A

Average acceleration = change in velocity / time taken
a = (v - u) / t

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

On a distance-time graph, the gradient of the line is numerically equal to …

A

the speed

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

On a speed-time graph, the gradient of the line is numerically equal to …

A

the acceleration

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

On a speed-time graph, the area under the line is numerically equal to …

A

the distance traveled

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

Velocity vs. Speed

A

Speed is the rate of distance covered. It is scalar.
Velocity is speed in a particular direction. It is vector.

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

If no external force is acting on it, an object will … (2)

A

If stationary, remain stationary
If moving, keep moving at a steady speed in a straight line

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

Speed-time graph for an object at rest

A

Line at zero, along the x-axis (y-axis is speed)

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

Speed-time graph for an object with a constant speed

A

Horizontal line (y-axis is speed)

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

Speed-time graph for an object with changing speed

A

A line that moves up or down (y-axis is speed)

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

A micrometer screw gauge is used to measure …

A

very small distances

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

Vector quantities

A

Magnitude and direction are both required to define the quantity

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

Scalar quantities

A

Quantities that can be defined with magnitudes only

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

Retardation

A

Deceleration: it is negative acceleration, or slowing down

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

Displacement vs Distance

A

Displacement is distance in a single direction. It is vector.
Distance is the path taken irrespective of the direction. It is scalar.

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

The acceleration of free fall (g) near to the Earth is …

A

constant

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

Force

A

a push or a pull, exerted by one object on another: it has direction as well as magnitude, so it is a vector

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

Force SI units

A

Newtons (N)

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

Mass SI units

A

Kilograms (kg)

20
Q

Acceleration SI units

A

Metres per second squared (m/s²)

21
Q

Inertia

A

Resistance to change in velocity
More mass –> more inertia

22
Q

Unbalanced forces are equivalent to a single force, called the …

A

resultant force

23
Q

Define the newton (1 newton is equal to …)

A

1 newton is the force required to give a mass of 1 kilogram an acceleration of 1 metre per second squared

24
Q

Static friction vs Dynamic friction

A

Static friction > Dynamic friction
Starting friction > Moving friction

25
Q

Gravitational force main features (3)

A

All masses attract each other
The greater the masses, the stronger the force
The closer the masses, the stronger the force

26
Q

Weight equation

A

Weight = mass x gravity
W = mg

27
Q

To every action there is an …

A

equal but opposite reaction

28
Q

Vectors and the parallelogram rule (3 steps)

A
  1. From 0, draw two lines to represent the vectors: the direction and length of each line must be in proportion to the magnitude of each
  2. Draw in 2 more lines to complete the parallelogram
  3. Draw in the diagonal from 0: it represents the resultant magnitude and direction
29
Q

Centripetal force

A

the inward force needed to make an object move in a circle

30
Q

More centripetal force is needed if … (3)

A

the mass of the object is increased
the speed of the object is increased
the radius of the circle is reduced

31
Q

Mass vs Weight

A

Mass is the quantity of matter in a substance
Weight is the force exerted on an object in a gravitational field due to its mass

32
Q

The Earth is the source of a …

A

gravitational field

33
Q

Gravitational force SI unit

A

N / kg

34
Q

Density equation

A

density = mass / volume
p = m / V

35
Q

Forces may change the ____, _____ and ______ of a body

A

size, shape, motion

36
Q

Hooke’s law

A

If the extension is proportional to the load beneath its elastic limit, an object obeys Hooke’s law

37
Q

Equation involving spring constant

A

load = spring constant x extension
F = kx

38
Q

Friction

A

the force between two surfaces which impedes motion and results in heating

39
Q

Air resistance is a form of …

A

friction

40
Q

Resultant force of scalar quantities calculated by …

A

addition (and/or subtraction)

41
Q

If there is no resultant force on a body, it either …

A

remains at rest or continues at a constant speed in a straight line

42
Q

Pressure equation

A

Pressure = force / area
p = F / A

43
Q

Moment of a force

A

a measure of its turning effect

44
Q

Moment equation

A

Moment = product force x perpendicular distance from the pivot

45
Q

Principle of moments: if an object is in equilibrium …

A

the sum of the clockwise moments about any point is equal to the sum of the anticlockwise moments about that point

46
Q

When there is no resultant force and no resultant turning effect, a system is in …

A

equilibrium

IGCSE Physics (9 decks)

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