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Papessa [141]
3 years ago
13

1) A crane uses an average force of 5,200 N to lift a girder 25 m. How much work does the crane do on the girder?

Physics
1 answer:
Andrej [43]3 years ago
8 0

Answer:

1) 130, 000 J

2) 1 J

Explanation:

1)

Work done is product of force in Newtons and distance in meters

W=Fd

Given an average force of 5,200 N and distance of 25 m then we evaluate that

Work done=5200*25=130, 000 Nm or Joules

2)

Similarly, for the second question, given force of 1N and distace of 1 m then the work done will be

W=1*1=1 J

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The ground state energy of an electron in a one-dimensional trap with zero potential energy in the interior and infinite potenti
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Answer:

0.5 eV

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So,

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3 years ago
(a) Calculate the absolute pressure at the bottom of a fresh- water lake at a depth of 27.5 m. Assume the density of the water i
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Answer:

a) P = 370.993\,kPa, b) F = 25.948\,kN

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