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प्रश्न
A machine raises a load of 750 N through a height of 16 m in 5 s. calculate:
- energy spent by machine,
- power at which the machine works.
उत्तर
- Energy spent by machine or work done = F × S
Work, W = 750 × 16 = 12000J - Power spent = `"work done"/"time taken " = "12000j"/"5s" = 2400 "w"`
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