A rock with a Weight of 156.8 newtons falls 5 meters. What potential energy does it have left before the end of its fall?
4 answers
Where? The end of the fall is at the bottom. exactly where do you mean before?
It loses 156.8 x 5 = 784 Joules of PE (potential enerry) during the fall.
It doesn't make sense to ask how much is left, since it depends upon the elevation you define zero P.E. to be. That is arbitrary. Only changes in PE matter.
We get a lot of senseless quetions here. Blame the schools.
It doesn't make sense to ask how much is left, since it depends upon the elevation you define zero P.E. to be. That is arbitrary. Only changes in PE matter.
We get a lot of senseless quetions here. Blame the schools.
it should be 156.8 x 5^2 = 3920
its going to be PEg = mgh = FgH
so 156.8 x 5 x 9.8 = 7683.2
(9.8 m/s^2 is the acceleration due to the gravity of earth)
so 156.8 x 5 x 9.8 = 7683.2
(9.8 m/s^2 is the acceleration due to the gravity of earth)
0 answers