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03-10-2008, 11:42 PM
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| Physics questions help?
1. a crane lifts a load of weight 5000N though a height of 5m in 20 secs. Calculate the power of the crane? 2. A 60W electric lamp changes electrical energy into light and heat energy. How much energy does the lamp convert in 25 seconds? 3. Alice measures her personal power output by running up a flight of steps. She takes 6.6 secs to run up a flight of steps of vertical height 6meters. Her mass is 50kg. What power does she develop?      |
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