Question

the great pyramid of khufu (giza, egypt) is about 140m tall. How much work would be required to raise an average - sized pyramid black (2.5 tons) to this height?

Answer 1

3.43 MJ

• much work should be required to raise an averaged sized pyramid black(2.5 tons) to this height.

Answer 2

3.43 MJ

Step-by-step explanation:

The work required to raise a 2500 kg block to a height of 140 m is ...

W = Fh = (mg)h

= (2500 kg)(9.8 m/s²)(140 m) = 3,430,000 kg·m²/s²

= 3.43 MJ

The work required is 3.43 megajoules.

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Additional comment

Reportedly, a motivated human performing manual labor can sustain a power output of about 75 watts. At that rate, it would take about 12.7 hours of continuous effort for one person to lift the block to that height.