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11 Cards in this Set
- Front
- Back
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What is work done |
When a force moves an object through a distance, work is done on object and energy is transferred |
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what do you need for object to move |
a force needs to act on it, thing applying force needs energy source |
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work done is same as |
energy transferred |
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what's formula for work done |
work done = force x distance moved w F d |
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What is power |
Rate at which energy is transferred |
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Equation for power |
power = work done - - - - - - - - - - time taken W P t |
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What's unit for power |
Watt W |
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Anything that is moving... |
Anything that is moving has energy in its kinetic energy store, transferred to this when object speeds up, transferred away when slows down |
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what's formula for energy in kinetic energy store |
kinetic energy = 0.5 x mass x speed2 KE 0.5 x m x v2 |
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How do you work out energy in gravitational potential energy store |
GPE = mass x gravitational field strength x height GPE m x g x h |
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whats equation for a falling objects GPE when no air resistance |
energy lost from GPE = energy gained in kinetic |
