What's happens when?

  • Thread starter Biologik
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  • #1
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Main Question or Discussion Point

You throw a rock. What is happening to that rock, and how is the energy transferred?
 

Answers and Replies

  • #2
jtbell
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What do you think, just to get the discussion started?
 
  • #3
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What do you think, just to get the discussion started?
Well I think the kinetic energy from your hand is transferred from the atoms in your hand to the atoms in the rock and thereby accelerating it.
 
  • #4
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Not a stupid question.

When you throw a rock, the kinetic energy from your hand is transferred from your hand to the rock thereby accelerating the rock correct? This is what I think, correct me if I am wrong.
 
  • #5
ZapperZ
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Two threads started by the OP on the same topic have been merged.

Zz.
 
  • #6
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Transfer of Kinetic energy.

1.I am in 8th grade
2. I am 13 years old
3. Don't answer like I'm a physicist
4.Don't answer like I'm a retard
5.Do answer like I'm in High school.

Here is the question:

Kinetic energy is transferred from one object to another by transferring the energy through the atoms of the object sending the kinetic energy right? Once the energy is transferred from the sending object, the energy that the sending object had, now the receiving object has correct? So if it was pushing forward, now the object moves forward.


If this is grounds for a warning I really don't know what else to do.
 
  • #7
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Two threads started by the OP on the same topic have been merged.

Zz.
No one is going to reply. That's why I made a new one.
 
  • #8
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When you throw a rock, the kinetic energy from your hand is transferred from your hand to the rock thereby accelerating the rock correct?
Sounds good!!!!


Here is how wikipedia describes it, and does a good job:

The kinetic energy of an object is the energy which it possesses due to its motion.[1] It is defined as the work needed to accelerate a body of a given mass from rest to its current velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. Negative work of the same magnitude would be required to return the body to a state of rest from that velocity.
See EXAMPLES for some specific applications. In your example, the hand get's it's energy from muscles burning up calories to move the arm, hand, ball and also the brain to coordinate the activity......and so "biological" energy is converted to kinetic energy.
 

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