contestada

If a crane worker lifts a crate with a mass of 120 kg from the ground to a
shipping container that is 30 meters off the ground, by how much has the
worker increased the gravitational potential energy of the crate? (Recall that g
= 9.8 m/s2)
A. 46,720 J
B. 35,280 J
C. 29,950 J
D. 18,180 J
SOEM

Respuesta :

Answer:

  • A. 88,200 J

Explanation:

Given data,

  • mass of the crate, m = 200 kg
  • height of the shipping container, h = 45 m
  • gravitational of a body is possessed by the body due to the virtue of its position.

The formula for gravitational potential energy is,

                                 P.E = mgh joules

Substituting the values

                                  P.E = 200 x 9.8 x 45

                                         = 88,200 J

Hence, the gravitational potential energy of the crate is, P.E = 88,200 J

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