Elastic Collision in Deep Space

In summary, the conversation was about a physics problem involving an elastic collision between two objects of equal mass in deep space. The problem asked for the final velocities of both objects, the time at which the kinetic energy of the system is at a minimum, and what the kinetic energy has been converted to. The person seeking help had attempted the problem, but needed feedback and validation of their answers. They were able to correctly determine the final velocities, but needed more guidance in understanding the concept of minimum kinetic energy and its conversion. They eventually concluded that the minimum kinetic energy would occur during the middle of the collision and that it would be converted into internal energy.
  • #1
Rookie
40
0
Hello! I need help with this physics problem, I've some what attempted it and I need some feedback. ANY help would be awesome!

Homework Statement


Two objects (A and B) of equal mass, undergo an elastic collision in deep space. Initially, B is at rest and A approaches at velocity v. The duration of contact is 2 seconds.

(a) What is the velocity of object A after the collision (final velocity)?
(b) What is the final velocity of B?
(c) At what time is the kinetic energy of the two object system a minimum?
(d) What has the kinetic energy been converted to?

Homework Equations


The Attempt at a Solution


(a) A velocity is 0.
(b) B velocity is equal to A initial velocity, v.
(c) I don't know :|
(d) Momentum (not sure).
 
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  • #2
Hi Rookie,

a,b) Your answers seem intuitive and while they could be right you need to use equations to validate your claims.

c) What is the sequence of events of the elastic collision? This can help you understand the question.
d) What can Kinetic Energy convert into?
 
  • #3
c) Would it be at the middle of the collision, 1 second? Where minimum there is no relative motion, I think?
d) Sound energy and thermal energy?
 
  • #4
c) That is where it should be in ideal conditions.
d) Well those are true but do not happen in space during an assumed ideal elastic collision. What else can store energy in this setup?
 
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  • #5
Ahh is it internal energy?
 

Related to Elastic Collision in Deep Space

1. What is an elastic collision in deep space?

An elastic collision in deep space is a type of collision between two objects or particles that does not result in any loss of kinetic energy. In other words, the total kinetic energy of the system before and after the collision remains the same.

2. How is an elastic collision in deep space different from an inelastic collision?

In an inelastic collision, some kinetic energy is lost as the objects stick together or deform upon impact. In an elastic collision, the objects bounce off of each other without any loss of kinetic energy.

3. What factors affect the outcome of an elastic collision in deep space?

The mass, velocity, and angle of approach of the objects involved in the collision all affect the outcome. In an elastic collision, the angle of approach is especially important as it determines the direction and magnitude of the objects' velocities after the collision.

4. Can an elastic collision occur in a vacuum?

Yes, an elastic collision can occur in a vacuum because it does not require any medium for the objects to interact with each other. In fact, elastic collisions are commonly studied in deep space where there is no air resistance or other external forces.

5. What is the practical application of studying elastic collisions in deep space?

Studying elastic collisions in deep space can help us understand the mechanics of celestial bodies and their interactions. It also has practical applications in fields such as astrophysics and space engineering, where precise calculations and predictions of collisions between objects are necessary.

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