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The rollercoaster is raised a vertical distance of 35m to point A by a motor in 45 seconds. The mass of the rollercoaster is 600kg. The motor has a power rating of 8000W. Gravitational field strength =
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The rollercoaster is raised a vertical distance of 35m to point A by a motor in 45 seconds.

The mass of the rollercoaster is 600kg.

The motor has a power rating of 8000W.

Gravitational field strength = 9.8 N/kg.

Calculate the percentage efficiency of the motor.

The rollercoaster is raised a vertical distance of 35m to point A by a motor in 45 seconds-example-1
User Dany Dhondt
by
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1 Answer

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Answer: 57.17%

600kg = 5880N
(600 x 9.8)
As mass x gravity = weight.

Power= 5880 x 35/45 = 4573.3W
(Force x velocity, velocity is distance/time)

Efficiency= 4573.3/8000 x100 = 57.17%

User Krastanov
by
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