Question

A machine raises a load of 750 N through a height of 16m in 5s. Calculate: (i) the energy spent by the machine. (ii) the power of the machine if it is 100% efficient.

April 8, 2024

Answer

Force = 750N

height or distance moved = 16 m

time = 5 s

(i) Energy spent or the work done = F × S

Work = 750 × 16 = 12000 J

Therefore, energy spent is equal to 12000 J

(ii) Power = $Work\over Time$

= $12000\over 5$

= 2400 W

Therefore, power spent is equal to 2400 W.

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