A 0.29-kg stone is held 1.4 m above the top edge of a water well and then dropped into it. The well has a depth of 4.8 m. (a) Taking  y = 0  at the top edge of the well, what is the gravitational potential energy of the stone–Earth system before the stone is released?  J (b) Taking  y = 0  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?  J (c) What is the change in gravitational potential energy of the system from release to reaching the bottom of the well?  J

Question

A 0.29-kg stone is held 1.4 m above the top edge of a water well and then dropped into it. The well has a depth of 4.8 m.

(a) Taking 
y = 0
 at the top edge of the well, what is the gravitational potential energy of the stone–Earth system before the stone is released?
 J

(b) Taking 
y = 0
 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?
 J

(c) What is the change in gravitational potential energy of the system from release to reaching the bottom of the well?
 J

 

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