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2007-08-09 15:54:17 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
1) The kinetic energy decreases and the potential energy increases.
2) v^2 = 2gR - this is derived from 1/2 mv^2 = mgR.
2007-08-09 16:01:12 · answer #1 · answered by Scarlet Manuka 7 · 0⤊ 0⤋
A rock is thrown straight up from the surface of the Earth. Which one of the following statements describes the energy transformation of the rock as it rises? Neglect air resistance.
Nope. The total energy of the rock increases.
Nope Both the potential energy and the total energy of the rock increase.
Nope The kinetic energy increases and the potential energy decreases.
Yup (it gains orbital elivation and looses velocity) The kinetic energy decreases and the potential energy increases.
Nope Both the kinetic energy and the potential energy of the rock remain the same.
2007-08-09 23:00:43 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The kinetic energy decreases and the potential energy increases.
Once the rock is in motion the total energy remains constant. kinetic energy is (1/2)mv^2. The velocity is decreasing as the rock is ascending, so the kinetic energy is decreasing as well, which means that the potential energy is increasing (potential energy is being stored to be returned to the rock on the descent).
2007-08-10 00:40:05 · answer #3 · answered by Anonymous · 0⤊ 0⤋
1: kinetic decrease potential increase since its height is getting higher and they have an inverse relationship.
2. v = mgr, at beginning energy is all potential and 0 kinetic. with conservation of energy and potential being 0 at bottom, kinetic must equal potential from before
2007-08-09 23:02:11 · answer #4 · answered by Matt D 1 · 0⤊ 0⤋