Which ones of these listed are examples of kinetic energy?
1. A reservoir of water behind a hydroelectric dam has more _____ energy.
2. A tree that is kept from toppling over by leaning on another tree has more _____ energy.
3. A marble rolling along an level surface has more _____ energy.
4. A car parked at the top of a hill has more _____ energy.
5. A space ship moving through space far from any planet has more _____ energy.
6. A tightly wound spring has more _____ energy.
7. A bullet fired in space has more _____ energy.
2007-05-16 08:22:22 · 5 answers · asked by JaNaLiEn 2 in Science & Mathematics ➔ Physics
Answer: 3, 5 & 7.
Kinetic energy is energy of motion. The kinetic energy of an object is the energy it possesses because of its motion. The kinetic energy* of a point mass m is given by
KE = 1/2mv2
Kinetic energy is an expression of the fact that a moving object can do work on anything it hits; it quantifies the amount of work the object could do as a result of its motion. The total mechanical energy of an object is the sum of its kinetic energy and potential energy.
Dr. H
2007-05-16 08:44:42 · answer #1 · answered by ? 6 · 0⤊ 0⤋
Potential energy is the amount of energy that could be released if an action were to happen. A roller-coaster at thh top of the big hill is a common analogy used. The potential energy is how much energy the roller coaster will have in action as it goes down the hill
2016-05-19 22:35:00 · answer #2 · answered by maxine 4 · 0⤊ 0⤋
I get 3, 5, 7
2007-05-16 08:26:51 · answer #3 · answered by jsardi56 7 · 0⤊ 0⤋
3, 5, 7, rest are potential
2007-05-16 08:26:45 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Its really simple...
If its in motion its kinetic energy.
If its got the potential to move and create kinetic energy it is potential energy.
1)Potential
2)Potential
3)Kinetic
4)Potential
5)Kinetic
6)Potential
7)Kinetic
2007-05-16 08:26:43 · answer #5 · answered by Brian K² 6 · 1⤊ 0⤋