Find the magnitude of force applied when an object is moved through a distance of 20m by doing work of 30J.
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Commercial unit of energy 250 units
1 unit = 1 kWh
∴250 units - 250 kWh
1kWh = 3.6 × 106J
250 units 250 × 3.6 × 106J
Energy in Joules = 9 × 108 J
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