Energy sources and resources
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………. energy is the energy stored in object due to its height or its position.(petrol - nuclear reactions - sun - coal)
Sun
Mechanical energy is the sum of .........energies.( potential and heat - potential and kinetic - potential and light - light and kinetic)
Potential and kinetic
An object of 20N weight is placed at 5m height , it has potential energy ........................
Potential = weight x height = 20 x 5 = 100 Joules.
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