The Object in the Figure Has a Mass of 3

question 69

Multiple Choice

The object in the figure has a mass of 3.45 kg and is pulled up a slope AB, which is 36 m long; the height BC is 3.00 m. There is no friction and the acceleration is constant. The speed v₁ at A is 3.5 m/s whereas the speed v₂ at B is 5.5 m/s. The average power developed by the motor pulling the object is

• A) 17 W
• B) 3.9 W
• C) 13 W
• D) 0.13 kW
• E) 43 W

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