Calculating Energy Loss in a Hockey Puck Collision

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In summary, one hockey puck with a mass of 0.1 kg and an initial velocity of 3.8 m/s collides with an identical stationary puck on a frictionless ice rink. After the collision, the first puck has a velocity of 0.8 m/s in the same direction. The question asks for the fraction of energy lost by the first puck. Since the rink is frictionless, no energy should be lost. This is a conservation of momentum problem and the energy lost by the first puck can be calculated using the formula E=1/2mv^2.
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hganser
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One hockey puck of mass 0.1 kg strikes an identical stationary puck on a frictionless ice rink. If the first puck had a velocity V(0)=3.8m/s before the collision and v(1)=0.8 m/s after in the same direction, what fraction of the energy was lost?
Where do I even start to find the answer??
 
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  • #2
If the rink is frictionless, then no energy should be lost. This is a momentum problem, and momentum is a conserved quantity. Is this your question, or are you trying to find the fraction of energy lost in the first puck as opposed to the fraction of energy lost of the system?
 
  • #3
I would assume the question is asking how much energy was lost by the first puck.

That's a simple matter of taking the energy before and after via E=1/2mv2

The difference would be the energy lost by the first puck.
 
  • #4
If you are indeed talking about the energy lost by the first puck then dantose is correct.
 

1. What is a hockey puck collision?

A hockey puck collision is when two or more hockey pucks come into contact with each other, resulting in a change in their direction or speed.

2. How do you measure the force of a hockey puck collision?

The force of a hockey puck collision can be measured using the principles of Newton's second law, which states that force equals mass times acceleration. By measuring the mass and velocity of the puck before and after the collision, the force can be calculated.

3. What factors affect the outcome of a hockey puck collision?

The outcome of a hockey puck collision can be affected by various factors such as the speed and direction of the pucks, the angle of collision, the surface of the ice, and the elasticity of the pucks.

4. How does the conservation of momentum apply to hockey puck collisions?

The conservation of momentum states that the total momentum of a closed system remains constant. In the case of hockey puck collisions, the total momentum of the pucks before the collision will be equal to the total momentum after the collision, even if the individual puck's velocities change.

5. Can the outcome of a hockey puck collision be predicted?

The outcome of a hockey puck collision can be predicted to some extent by using mathematical principles and models. However, the unpredictable nature of the sport and the various factors that can affect the collision make it difficult to accurately predict the exact outcome.

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