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A machine raises a load of 750N through a height of 16m in 5 s. Calculate:
A machine raises a load of 750N through a height of 16m in 5 s. Calculate:
Class 10 | ICSE | Physics | Selina | Work Energy
A machine raises a load of 750N through a height of 16m in 5 s. Calculate:

(i) the energy spent by the machine.

(ii) the power of the machine if it is 100% efficient.

Solutions:

(i) Energy spent by machine is simply the  work done by the machine and we know that the expression for work done is –

W = FS = 750 × 16

So, W = 12000 J

(ii) Expression for Power is –

Power = work done / time taken = 12000 J / 5s

Power = 2400 W

i

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