Question

Asked Mar 25, 2019

The second floor of a house is 6 m above the street level.

How much work is required to lift a 270-kg refrigerator to the second-story level? Express your answer to two significant figures and include the appropriate units.

Step 1

According to work energy theorem, the work done in raising an object is equal to the change in the gravitational potential energy.

Step 2

Here, *Pf* is the final potential energy, *Pi* is the initial potential energy, *m* is the mass, *h* is the height and *g* is the...

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