Science
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Last updated 11:03 AM on 3/9/25
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11 Terms
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Work
Work is said to be done when a force is applied to an object and the object moves in the direction of the force.
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Formula for Work
Work = Force × Displacement × cos(θ)
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SI Unit of Work
The SI unit of work is Joule (J).
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One Joule of Work
One Joule (1J) is the work done when a force of 1 Newton (N) moves an object 1 meter (m) in the direction of the force.
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Formula for Power
Power = Work Done / Time Taken
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SI Unit of Power
The SI unit of power is Watt (W).
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One Watt of Power
One Watt (1W) is the power when 1 Joule of work is done in 1 second.
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Kilowatt
1 kW = 1000 W.
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Megawatt
1 MW = 10⁶ W.
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Gigawatt
1 GW = 10⁹ W.
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What does '60W' marked on a bulb mean?
'60W' means the bulb consumes 60 Joules of energy per second, indicating its power rating.
