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Answered

What is the power output of an electric motor

that lifts a 2.0-kilogram block 15 meters

vertically in 6.0 seconds?

(1) 5.0 J (3) 49 J

(2) 5.0 W (4) 49 W

Verified Answer :

taskmasters

Mass of the block = 2.0 kg
Value of gravity = 9.81 m/s^2
Distance upto which the mass is lifted = 15 meters
Time taken to lift the mass of the block = 6.0 seconds
Now we already know
Work Done = Mass Gravity Distance
                   = 2 9.81 15
                   = 294 Joules
Then
Power Output = Work Done/Time
                       = 294/6
                       = 49 Watts
So the power output of the electric motor is 49 watts.The correct option among all the options given in the question is option "4".

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