A 0.32-kg stone is held 1.5 m above the top edge of a water well and then droppe

Question

A 0.32-kg stone is held 1.5 m above the top edge of a water well and then dropped into it. The well has a depth of 4.7 m. (a) Relative to the configuration with the stone at the top edge of the well, what is the gravitational potential energy of the stone-Earth system before the stone is released? 4.708 (b) Relative to the configuration with the stone at the top edge of the well, what is the gravitational potential energy of the stone-Earth system when it reaches the bottom of the well? 19.463 Your response differs from the correct answer by more than 10%. Double check your calculations. J

Explanation / Answer

a) E1 = m*g*h

E1 = 0.32*9.81*1.5
= 4.708 J

b) E2 = m*g*h

E2 = 0.32*9.81*(-4.7)
= -14.74 J

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