A500-kg elevator is raised to a height of 20 m in 10 seconds. calculate the power of the motor. a) 98,000 w b) 9,800 w c) 2,500 w d) 1000 w

<>"power = 500 kg x 9.8 m/s² x 20 m / 10s = 9800 watts."<>

Power, P =9800 W

Explanation:

It is given that,

Mass of the elevator, m = 500kg

It is raised to a height of 20 m in 10 seconds

Power is defined as the work done per unit time.

Work done is given by :

h is the height

So,

P = 9800 Watts

Hence, the power of the motor is 9800 W. The correct option is (b).

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c) both a and b.