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AS Levels > Physics Formulas > Flashcards

Physics Formulas Flashcards

1
Q

Power (force and volumes)

A

P=Fv, watt

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2
Q

Power (work and time)

A

P=W/t, watt

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3
Q

Power (current and resistance)

A

I²R, watt

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4
Q

Power (voltage and resistance)

A

V²/R, watt

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5
Q

Power (charge and voltage)

A

QV/t, watt

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6
Q

Frequency (unit)

A

1/T, Hz

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7
Q

Average velocity

A

s/t, ms^-1

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8
Q

Average acceleration

A

∆v/∆t, ms^-2

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9
Q

Uniformly accelerated motion (v)

A

u+at

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10
Q

Uniformly accelerated motion (s and a)

A

s=ut+1/2at²

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11
Q

Uniformly accelerated motion (s and 1/2)

A

s=(u+v)/2 * t

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12
Q

Uniformly accelerated motion (v and s)

A

v²=u²+2as

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13
Q

Momentum (p)

A

mv (v is velocity), kgms^-2

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14
Q

Conservation of linear momentum

A

maua + mbub = mava + mbvb, joules

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15
Q

Elastic collision (kinetic energy)

A

1/2 maua² + 1/2 mbub² = 1/2 mava² + 1/2 mbvb², joules

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16
Q

Inelastic collision

A

1/2 maua² + 1/2 mbub² > 1/2 mava² + 1/2 mbvb², joules

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17
Q

Weight

A

mg, N

18
Q

Momentum & 2nd law of motion

A

F=(mv-mu)/t = ma

Rate of change of momentum is
equal to the net force applied

19
Q

Density (m and V)

A

m/V (V is volume), kgm^-3

20
Q

Pressure in fluids

A

rhogh ,pascal

21
Q

Pressure

A

F/A, N/m²

22
Q

Young’s Modulus

A

stress/strain or (F/A)/(x/L), N/m²

23
Q

Velocity of a wave

A

f*lambda, m/s

24
Q

Alpha decay

A

Proton 2, neutron 4

25
Q

Beta-decay

A

Proton -1, same neutron number

26
Q

Gamma decay

A

Only loss of energy

27
Q

Strain energy (Area under force-extension graph)

A

1/2kx², joules

28
Q

Potential divider

A

R2/(R1+R2) x V, voltage

29
Q

Power (current and voltage)

A

IV, watt

30
Q

Electric field intensity [between 2 parallel plates]

A

V/d, Vm^-1

31
Q

Charge (Quit) [Q]

A

It, couloumbs

32
Q

Efficiency

A

(Useful energy output/total energy output) x 100

33
Q

∆Work (external work done by expanding gas) from area under graph

A

p∆ܳV

34
Q

Torque

A

F*perpendicular d

35
Q

Voltage (work and q)

A

W/Q

36
Q

Resistance (resistivity)

A

(resistivity*L)/A

37
Q

Gee Xander, ultra violent nannies fighting my right

A

Gamma rays, X-rays, UV rays, visible light,

38
Q

Impulse (∆p)

A

Ft

39
Q

Phase difference

A

amount of wave (1/2, 3,4) x 360

40
Q

Path difference

A

amount of wave x lambda

41
Q

Diffraction grating

A

lambda = slit width * fringe width / distance of slit to fringe or lambda = ax/D

AS Levels (5 decks)

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