g how long will it take a 3500- w motor to lift a 365- kg piano to a sixth-story window 18.0 m above?

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10-11-2022
Physics

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g how long will it take a 3500- w motor to lift a 365- kg piano to a sixth-story window 18.0 m above?

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jaspreetsharma jaspreetsharma · Answer 1 · 2022-11-16T01:28:50-05:00

Lifting a 365-kg piano to a window on the sixth floor will require a 3500-w motor in 17.6 seconds. In a motor, electrical energy is transformed into mechanical energy.

According to estimates, motors use close to half of the energy utilized worldwide. An electrical device known as a DC motor transforms electrical energy into mechanical energy. Direct current, which is used as an electrical energy source in a DC motor, is converted into mechanical rotation.

P= 3500 W m = 350 h = 18m for Data Part A given.

Energy needed is known to be mah,

which is 350 x 9.8 x 18 J, or 61 74 0 J.

As it also known, Power = Energy/Time.

Time = Energy/Power = 61740/350 0 T = 17. 64S

Time taken therefore equals 17.6 seconds.

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