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A 60 HP electric motor lifts an el...

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 ms ^( - 2 ) ` )

A

` 1.7 m s ^( - 1 ) `

B

` 1.9 ms ^( - 1) `

C

` 2. 0 ms ^( - 1 ) `

D

`1.5 ms ^( - 1 ) `

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