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14 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Gravitational potential energy |
Ep = mg^h Gravitational potential energy(J) Mass(kg) Gravitational constant (N/kg) Change in Height (m) |
Joules, kg, N/kg, change in, m |
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Change in objects gravitational potential energy store |
Change in objects gravitational potential energy store = weight x change in height (J),(N),(m) |
(J),(N),(m) |
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Work done |
Work done = force applied x distance moved in the direction of the force |
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Kinetic energy |
Ek = (1/2 x mass) x (velocity ²) Or Ek = (1/2 x m) v ² (J), (kg), (m/s) |
(J),(kg),(m/s) |
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Speed |
Speed = distance / time (m/s),(m),(s) |
(m/s),(m),(s) |
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Force applied |
F = k x e F - Force applied K - spring constant E - extension |
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Elastic potential energy |
Ep = 1/2 x k x e ² Or Ep = (1/2 x k) x (e ²)
Ep - elastic potential energy 1/2 x k - spring constant E ² - extension |
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Efficiency |
Efficiency = useful energy / total energy in joules Or Efficiency = useful power out / total power in |
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Cost |
Cost = energy used x cost per unit (p),(kWh),(p) |
(p),(kWh),(p) |
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Power wasted |
Power wasted = total power in - useful power out |
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Electrical power |
P = e/t P = watts (w) E = energy (j) T = seconds (s) |
(w),(J),(s) |
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Energy transferred |
E = p x t E = energy transferred (J) P = power / watts (w) T = time (t) |
(J),(w),(t) |
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A known change of temperate of a known mass of a substance (Energy Transferred) |
Energy transferred = mass x specific heat capacity x temperature change |
(J)(Kg)(J/Kg°C)(°C) |
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Specific heat capacity |
Specific heat capacity = energy transferred/mass x temp change |
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