Online Physics HW~Elastic Collision

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SUMMARY

The discussion centers on solving an online physics homework problem regarding elastic collisions, specifically involving two protons. The problem states that one proton, moving with an initial velocity (vi), collides elastically with another proton at rest, resulting in the initially moving proton having a speed that is 2.00 times that of the initially at rest proton after the collision. Key equations mentioned include kinetic energy formulas K1 and K2, which are essential for calculating the speeds of the protons post-collision and understanding the conservation of momentum and kinetic energy in elastic collisions.

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  • Understanding of elastic collision principles
  • Knowledge of momentum conservation
  • Familiarity with kinetic energy equations
  • Basic vector analysis in physics
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  • Study the conservation of momentum in elastic collisions
  • Learn how to derive velocity components after collisions
  • Explore the concept of kinetic energy conservation in detail
  • Practice problems involving two-dimensional elastic collisions
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Students studying physics, particularly those tackling topics in mechanics and elastic collisions, as well as educators looking for examples to illustrate these concepts.

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Homework Statement



Hi guys,
Im a bit stumped on how to solve an online physics homework problem on elastic collision and it's really bothering me since we haven't gone over it in my class and all I have to help me is the book. I have no idea how to come up with the angles or even attempt the problem and neither do my friends. We'd all really appreciate it if someone could help us.
Many Thanks,
Pooja

A proton, moving with a velocity of vi, collides elastically with another proton that is initially at rest. Assuming that after the collision the speed of the initially moving proton is 2.00 times the speed of the initially at rest proton, find the following.
(a) the speed of each proton after the collision in terms of vi
initially moving proton _________multiplied by vi
initially at rest proton _______multiplied by vi


(b) the direction of the velocity vectors after the collision
initially moving proton __° relative to the +x direction
initially at rest proton __° relative to the +x direction

Homework Equations


K1=1/2m1vi^2
K2=1/2m2vi^2


The Attempt at a Solution

 
Physics news on Phys.org
What vector quantity is conserved in any collision? For elastic collisions, what else is conserved?
 
Hi,
I'm not sure but I'm going to say velocity?
 

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