How much work does an elevator motor do to lift a 1200-kg elevator car a height of 80 m at constant speed?

Work = 940800 J

Explanation:

As we know that work done is defined as

Work = (Force)(displacement in the direction of force)

here elevator motor lift a mass of 1200 kg

so in order to lift it up motor must have to apply the force same as the weight so that it will move up with constant speed.

so here we have

now it is displaced upwards by distance d = 80 m

so here we have

so above is the work done by the elevator to lift it upwards

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explanation:

hi there!

your question asks at which segment does freezing occur.

since we're talking about water, the freezing point of water will be 32 degrees fahrenheit or below.

hope this ! ~