Question

A motor does a total of 480 joules of work in 5.0 seconds to lift a 12-kilogram block to the top of a ramp. The average power developed by the motor is

(1)8.0 W
(2)40. W
(3)96 W
(4)2400 W

Answer 1

(3) 96 W

Step-by-step explanation:

When you plug into the values given into the equation like the one shown below:

Equation: P=W/t

Plugged: P=480J/5s

Final Answer: P=96 W

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Answer 2

Power may be defined as the rate of doing work or the rate of using energy. It is the amount of energy consumed per unit time. It is calculated as follows:

P = E / t
P = 480 / 5
P = 96 W <-----OPTION 3

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