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GCSE Physics > P4 - explaining motion > Flashcards

P4 - explaining motion Flashcards

1
Q

What is a contact force

A

A force where the two objects need to be touching, e.g pushing a chain

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2
Q

What are non contact forces

A

A force where the two objects do not need to touch, e.g the sun gravitational pull

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3
Q

What is the measure for mass

A

Kg

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4
Q

What direction is weight

A

Towards the centre of mass

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5
Q

What is the formula for weight

A

Weight = mass * gravitational field strength

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6
Q

What is the GFS on earth (for the sake of GCSE)

A

10 N/Kg

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7
Q

Is displacement scalar or vector

A

vector

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8
Q

How do u convert km/h to m/s

A

divide km/h by 3.6

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9
Q

formula for acceleration

A

acceleration = (change in speed)/time

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10
Q

equation for constant acceleration

A

v^2 = u^2 + 2as

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11
Q

what is v

A

final speed

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12
Q

what is u

A

start speed

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13
Q

what is s

A

distance

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14
Q

On a distance time graph, what does the gradient show

A

the average speed of the object

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15
Q

On a velocity time graph, what does the gradient show

A

acceleration

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16
Q

what does a flat line on a velocity time graph show

A

constant speed

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17
Q

What does the area under the line on a velocity time graph show

A

distance travelled

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18
Q

What must you always add to a resultant force

A

direction EVEN if at an angle, calculate the agnle

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19
Q

What is centripetal force

A

The force that stops the object flying away

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20
Q

What causes the centripetal force in a ball being spun on a rope

A

the tension in the rope

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21
Q

What causes the centripetal force in a moon orbiting the earth

A

The gravitational force from the earth

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22
Q

Equation for momentum

A

momentum = mass x velocity

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23
Q

What causes the centripetal force in a wooden block on a spinning table

A

The friction of the block

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24
Q

Formula for change in momentum

A

Change in momentum (kg m/s) = resultant force x time for which it acts

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25
what is the conservation of momentum
momentum before = momentum afterwards
26
Which gear move faster, the small or the big one
The small one
27
What is stopping distance?
Thinking distance + braking distance
28
Formula for work done e.g pushing a wheelchair up a hill
Work = force x distance
29
Formula for KE
KE = 1/2 x m x v^2
30
Formula for power (mechanical)
energy transferred / time
31
how much is one joule (in work done)
one newton metre
32
what is the typical speed of a plane
900 km/h
33
Formula for GDP
mass x GFS x height
34
Is acceleration scalar or vector
vector
35
What is the equation for resultant force
F = ma
35
units for work done
Joules
36
Formula for power
Power = work done/ time
37
What is power measured in
Watts
38
Formula for change in momentum
Change in momentum = force x time
39
Euqation for momentum linking mass and velocity
Mass x velocity
40
Formula for force
change in momentum / time
41
What is the unit for momentum
kgm/s
42
What is the law for conservation of energy
Cannot be created or destroyed, only transferred
43
What are the 8 energy stores
MAGNETIC ELECTROSTATIC ELASTIC gravitational potential nuclear kinetic thermal chemical
44
What is a system in physics
A collection of matter, when concerned with their energy levels
45
What is a open system
A system where energy can be transferred to the outside environment
46
What is a closed system
A system where neither matter or energy can enter or exit
47
formula for kinetic energy
1/2 mv^2
48
Formula for work done
Work done = Force x Distance W = fd
49
What is the measure of power
Watts
50
What is the measure of energy
Joules
51
What is the measure of work done
Joules
52
Formula for power
Power = Energy (transferred) / time P=E/t
53
x10^3
Kilo
54
x10^6
Mega
55
x10^9
Giga
56
x10^12
Tera
57
Tera
x10^12
58
Giga
x10^9
59
Mega
x10^6
60
Kilo
x10^3
61
10^-3
milli
62
10^-6
micro
63
10^9
nano
64
10^-12
pico
65
milli
10^-3
66
micro
10^-6
67
nano
10^9
68
pico
10^-12
69
What 3 things are needed for an interaction pair
Must be two different objects Must be the same type of force Forces must be equal and opposite
70
Is momentum scalar or vector
Vector

GCSE Physics (8 decks)

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