Question #03eda

1 Answer
Jul 29, 2017

Answer:

#6mgh#

Explanation:

To calculate the total work done, just add up the difference in the initial and final energy states of the four boxes.

#"energy change" = "mass" * g * "height change"#

So

  • #"box 1: " "energy change = 0"#
  • #"box 2: " "energy change"= mgh#
  • #"box 3: " "energy change"= 2mgh#
  • #"box 4: " "energy change"= 3mgh#

The total energy change #= 6mgh#