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9 Cards in this Set
- Front
- Back
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What is the principle of conservation of energy? |
Energy cannot be created or destroyed |
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How do u work out the work done? |
Work done = Force x distance moved in the direction of the force Work done = force x velocity |
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What is a propert of a force time graph |
The area under the line is the work done |
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What is hookes law? |
To stretch the spring ti extension Work done = 1/2 x force x change in length W = 1/2 F L |
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How do u work out kinetic energy? |
E = 1/2 x mass x velocity(squared) |
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What is the change in gravitational energy? |
E = mg x h |
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How do u work out power? |
P = change in E / time P = change in work done / time |
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How do u work out the motive power? |
Motive power = energy per second wasted due to resistive force + gain in kinetic energy per second |
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How do u work out efficiency? |
E = useful energy transferred / energy supplied E = work done / energy supplied |
