Physics Equations

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Description and Tags

Physics

GCSE Physics

CCEA

9th

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15 Terms

1
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weight

w=mg

units:

  • w = N

  • m = Kg

  • g = N/Kg

2
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hooke’s law

F=ke

Units:

  • F = N

  • k = N/(c)m

  • e = (c)m

3
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Density

D=M/V

units:

  • D = g/cm³

  • M = g

  • V = cm³

4
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pressure

P=F/A

units:

  • P = N/m² = Pa

  • F = N

  • A = m²

5
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moment

M=Fd

Units:

  • M = Nm

  • F = N

  • d = m

6
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Speed

S=d/t

Units:

  • S = m/s

  • d = m

  • t = s

7
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Average velocity

ave v=(u+v)/2

8
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Acceleration
a=(v-u)/t
9
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Displacement
s=(u+v)t/2
10
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Newton’s 2nd law

RF=ma

units:

  • RF = N

  • m = Kg

  • a = m/s²

11
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Work

W=Fd

units:

  • W = J

  • F = N

  • d = m

12
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Kinetic energy

K.E=1/2mv²

units:

  • K.E = J

  • m = Kg

  • v = m/s

13
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Gravitational Potential Energy

P.E=mgh

units:

  • P.E = J

  • m = Kg

  • g = m/s²

  • h = m

14
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Efficiency
E=UEO/TEI
15
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Power

P=w/t

units:

  • P = Watts

  • w = J

  • t = s