Kinetic Energy regarding Collision

In summary: Collision occurs when 2 objects move towards each other with some force so the kinetic energy is transferred from a high-energy object to a low-energy object. The kinetic energy is then lost in the form of heat and sound.
  • #1
rash219
23
0

Homework Statement



In an elastic collision of 2 objects, Kinetic energy is conserved. In an inelastic collision it is not. Where does the kinetic energy "go" in an inelastic collision ?

Homework Equations



None

The Attempt at a Solution



Ok i am not sure of the answer but is it supposed to be that the object with a higher velocity / mass transfers or merges its kinetic energy with the kinetic energy of the one that is lower thereby reducing it to zero...

Please help !
 
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  • #2
rash219 said:
Ok i am not sure of the answer but is it supposed to be that the object with a higher velocity / mass transfers or merges its kinetic energy with the kinetic energy of the one that is lower thereby reducing it to zero...
Not sure what that means...

Instead, think of what other form of energy that the translational KE might be transformed into by the collision.
 
  • #3
Collision occurs when 2 objects move towards each other with some force so...

What i was trying to say is the " K.E in case of inelastic collision is lost by means of transfer from a high K.E object to a low K.E object thereby making the low K.E object move in the same direction as that of the high K.E object or in some cases even canceled, zeroed out, in cases where both objects have their K.E equal
 
  • #4
Kinetic energy is not a vector--so it doesn't "cancel out" like momentum might. Instead, it must be transformed into a different sort of energy.

Hint: Smash a lump of clay against a wall. (An example of an inelastic collision.) What happens to the clay? (If you're not sure, imagine doing it one hundred times.) What about it changes?
 
  • #5
I think the linear momentum is conserved in an elastic or inelastic collision, Linear momentum and angular momentum, are conserved quanities like energy is. Not sure if linear momentum conservation is the same thing as angular momentum conservation as my Physics Book by Halliday and Resnick avoids the subject.
 
  • #6
Doc Al said:
Kinetic energy is not a vector--so it doesn't "cancel out" like momentum might. Instead, it must be transformed into a different sort of energy.

Hint: Smash a lump of clay against a wall. (An example of an inelastic collision.) What happens to the clay? (If you're not sure, imagine doing it one hundred times.) What about it changes?

Well according to your hint and from what i have learned the clay changes its shape and the energy is lost in the form of heat ad sound...
 
  • #7
Now you've got it.
 

1. What is kinetic energy in relation to collisions?

Kinetic energy is the energy that an object possesses due to its motion. In the context of collisions, it refers to the energy that is transferred from one object to another during the collision.

2. How is kinetic energy calculated in a collision?

Kinetic energy is calculated using the formula KE = 1/2 * m * v^2, where m is the mass of the object and v is its velocity. In a collision, the kinetic energy of the objects before and after the collision can be calculated to determine the amount of energy transferred.

3. What happens to kinetic energy during a collision?

During a collision, kinetic energy is transferred from one object to another. The total kinetic energy of the system will remain the same, but it may be distributed differently between the objects involved.

4. How does the mass and velocity of objects affect kinetic energy in a collision?

The kinetic energy of an object is directly proportional to its mass and the square of its velocity. This means that an object with a greater mass or velocity will have more kinetic energy, and thus can transfer more energy during a collision.

5. Can kinetic energy be converted into other forms of energy during a collision?

Yes, kinetic energy can be converted into other forms of energy during a collision, such as heat or sound. This is because energy cannot be created or destroyed, it can only be transferred from one form to another.

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