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Description
Flashcards by Emilia Taddonio, updated more than 1 year ago
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Created by Emilia Taddonio
about 7 years ago
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| Question | Answer |
| Principle of the conservation of energy | Energy cannot be created or destroyed. |
| Work Done, W (joules) = | force applied, F x distance moved along the line of action of the force, s |
| Change in object's gravitational potential energy store = | weight, N x change of height |
| ΔEp Change of gravitational potential energy store = | m g Δh mass x gravitational field strength x change in height |
| Ek= Kinetic energy = | 1/2 m v^2 1/2 x mass x speed squared |
| efficiency = | useful output energy transferred by the device __________________________ total input energy supplied to the device |
| Problem: Friction between the moving parts causes heating.... how would you improve the efficiency? | LUBRICATE! |
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