where does energy go?

[rednewguy]

lets follow the classical physics laws.

say i am playing cricket, hitting a ball. im spending my energy to hit the ball.
where does my energy goes. in what form is the energy at the end, when the ball has come to rest.

thanks.

 

[vfurlan]

When you hit the ball part of the energy is disipated as heat (ball gets a litle bit warmer and later disipate the heat in to the air) and in to the ball's kinetic energy. When the ball hits the ground, the kinetic energy is transformed in heat and (possibly) potential energy.

 

[jhbbunch]

It's mind blowing to think that all of the energy that goes into putting the space shuttle into orbit is dissipated as heat into bringning it back to earth. I mean think about that the next time yo whack a croquet ball.

 

[mehboob_iiui]

Suppose you throw a ball in the air, if the object is close to the surface of the earth, the energy will be stored in the object as potential energy, and will change back to kinetic energy when the ball comes down.

What is the ball is thrown so far that it can not come back , will it still have its potential energy or will it be converted to some other form...

 

[vfurlan]

You mean if the ball leavs Earth's gravity field and stays in space? Than all its energy will be transformed in to kinetic energy. Right?

 

[jonw0224]

If a ball is thrown into orbit so to speak then *most* of its energy is converted into potential energy, however some kinetic energy is left. It is still moving, but much slower than the escape velocity. If all of the kinetic energy is converted into potential energy the the object stops moving (stalls) and falls back down.

-jonathan

 

[rkenuox_]

When you hit the ball, the energy you used was transformed as the kinetic energy of the ball, some as heat energy as the ball gets warmer when you hit it.
As the ball travel, some kinetic energy transfomed to potential enrgy as we know that the sum of kinetic energy and potential energy of one body is always equal to zero.As the ball stop, the energy was taransformed to heat as it hit the ground.

-reu

 

[jeremymcgowan]

When you hit the ball, you give the ball kinetic energy and the ball loses this kinetic energy due to friction with the air and surface it travels upon in the form of heat. If the surface is uneven, there is a constant dwindling and increasing, to and fro, of kinetic energy being exchanged for potential energy. If you go up a hill, you gain potential energy, for example, in exchange for losing kinetic energy. And of course, the mere act of hitting the ball, heats the ball. Also, anything in motion has more mass than when at rest. The total mass content of anything is its rest mass and mass of motion. Mass is a form of energy. You effectively increase the mass of the object by (gamma - 1)m, where m is the rest mass of the object. This is so negligible that Newton failed to discover this.

 

[echo47]

Don't forget that by throwing an object upwards, you are also pushing the planet Earth's center of mass very slightly downwards (every action has an equal and opposite reaction). During the entire throw-fall-bounce sequence, the mutual center of mass doesn't move.

 

[rkenuox_]

Also don't forget that in every amount of kinetic energy losses by the ball, it also the amount of potential energy it acquired..

-reu

 

[sengyee88]

If a ball is thrown into orbit so to speak then *most* of its energy is converted into potential energy, however some kinetic energy is left. It is still moving, but much slower than the escape velocity. If all of the kinetic energy is converted into potential energy the the object stops moving (stalls) and falls back down.

-jonathan

There will not have a stall (stop moving) moment if the ball does not throw vertically up and assuming that friction is negligible.
Velocity is vector, which always comprises vertical and horizontal vector. Only vertical component will be converted to potential energy, the horizontal vector make the ball flies horizontally at all time.

 

[neils_arm_strong]

Ball hits bat.
The energies spent are Heat,kinetic and sound.
Again when the ball stops it looses the KE and does work against friction and comes to stop.

 

[nijirazdan]

well whatever the case, energy is always conserved.the dissipation of energy may vary from case 2 case,but overall energy is conserved.lets suppose u hit a batt with ur bat.so of the energy is lost in form of heating the bat.the rest is transferred to the ball n it gains momentum,now when the ball in flight hits the ground it loses its energ to dissipating forces such as friction ,viscosity etc.simple isnt it

 

[jakjoud]

First there is a bit of energy that is disspated in hiiting the bal as a heat diffusion and to give an energy greater than the kinetik one that the bal got to let it go.
Second the bal is retained by air this disspate largely his new kinetik nergy. Then it stopps

 

[roykyn]

once the ball hits the ground.....its like collision between two bodies....its not so elastic...i mean when the ball touches the ground a part is dissapated or transferes to ground and this is when a small portion of soil is thrown in to the air and an unnoticeable crater is formed.....but major of energy is retained in the ball....this is when the ball gets deformed and stores the energy in the form of potential energy....this then get converted in to kinetic energy and a part is lost as heat and other form like the ball material might absorb it and get deformed permanently....
a long story..............:!:

 

[sengar_vijay]

when u hit the ball, part of the energy is dissipated into heat and the rest is converted 2 kinetic energy.

whn the ball is travelling, it has to resist the air force & gravity, due 2 which it keeps on losing energy.

when the energy is over, the ball finally comes 2 rest.

thus the energy is only converted from one form to another but not lost.

 

[zeeshanzia84]

it is finally converted into KE of some air molecules. It is no longer in a form which might be of any use to u. Thus, we say that the ENTROPY of the universe has increased.

 

[123jack]

When it comes right down to it - I think the simple answer is entropy.

What I really want to know is where "darkness" goes to.

Every time I turn on a light bulb it sucks all the dark out of the room.
It must be doing something with it...

jack

 

[encoder]

when ball is hit by bat the some of energy is dissipated and rest changes into kinetic energy and if the ball hits the ground the kinetic energy changes into potential energy to bring the ball back.