A 60 HP electric motor lifts an elevator having a maximum total load capacity of 2000 kg

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A 60 HP electric motor lifts an elevator having a maximum total load capacity of 2000 kg. If the frictional force on the elevator is 4000 N, the speed of the elevator at full load is close to: (1 HP = 746 W, g=10 m/s2g = 10 \text{ m/s}^2 ) (1) 1.7 ms−11.7 \text{ ms}^{-1} (2) 1.9 ms−11.9 \text{ ms}^{-1} (3) 1.5 ms−11.5 \text{ ms}^{-1} (4) 2.0 ms−12.0 \text{ ms}^{-1}

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