Formulae - Energy Flashcards

1
Q

‘v’ stands for …

A

velocity (m/s)

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2
Q

‘h’ stands for …

A

height (m)

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3
Q

‘g’ stands for …

A

gravity (m/s^2)

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4
Q

Ep =

A

m x g x h

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5
Q

Ek =

A

1/2 x m x v^2

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6
Q

Ek stands for …

A

Kinetic Energy (J)

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7
Q

Ep stands for …

A

Potential (J)

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8
Q

Value for g

A

10

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9
Q

F =

A

m x a

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10
Q

Weight =

A

m x g

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11
Q

Work =

A

F x d

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12
Q

work is measured in

A

J

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13
Q

Force is measured in

A

N

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14
Q

Efficiency =

A

(useful energy)/(total energy) x 100%

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15
Q

Elastic Energy =

A

1/2 x k x e^2

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16
Q

‘e’ stands for …

A

extension (m)

17
Q

‘k’ stands for …

A

spring constant (N/m)

18
Q

(in S.H.C.) E =

A

m x c x (change in)T

19
Q

‘c’ stands for …

A

specific heat capacity (J/kg degree C)

20
Q

To calculate a change in T …

A

subtract the ending value from the starting value

21
Q

(with electricity) P =

A

I x V

22
Q

‘I’ stands for …

A

Current (A)

23
Q

‘P’ stands for …

A

Power (W)

24
Q

‘V’ stands for …

A

potential difference OR voltage (V)

25
Q

(in SHC prac) Work =

A

P x t

26
Q

‘t’ stands for …

A

time (s)

27
Q

‘change in’ is represented by …

A

delta (a triangle)

28
Q

work is a type of …

A

energy

29
Q

P = [two different formula]

A

E/t or W/t

30
Q

These are all measured in Joules

A

work, kinetic energy, potential energy, elastic energy, energy transferred