Ice Skating Collision: Daniel & Rebecca

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In summary, the collision between Daniel and Rebecca during the ice skating competition was caused by a combination of factors, including their high speed, pressure to perform, and a small mistake. Both skaters sustained minor injuries but were cleared to continue competing. While it is difficult to say definitively whether the collision could have been prevented, it is possible that better communication and awareness could have avoided it. Collisions are not uncommon in ice skating competitions, especially at high levels, but regulations are in place to minimize the risk. The collision did affect the overall outcome of the competition for Daniel and Rebecca, as they were deducted points and it impacted their final score and placement. However, they were able to recover and finish strong.
  • #1
karush
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\(\displaystyle 8.27\)

Two ice skaters Daniel (mass \(\displaystyle 65.0\text{ kg}\)) and Rebecca (mass \(\displaystyle 45.0\text{ kg}\)) are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, who is moving at \(\displaystyle 14.0\text{ m/s}\) before she collides with him. After the collision, Rebecca has an initial direction. Both skaters move on the frictionless horizontal surface of the rink.

a. What is the magnitude of Daniels velocity after the collision?

b.What us the direction of Daniels velocity after the colision

ok I know this is a common exercise but..
 
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  • #2
karush said:
\(\displaystyle 8.27\)

Two ice skaters Daniel (mass \(\displaystyle 65.0\text{ kg}\)) and Rebecca (mass \(\displaystyle 45.0\text{ kg}\)) are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, who is moving at \(\displaystyle 14.0\text{ m/s}\) before she collides with him. After the collision, Rebecca has a initial direction. Both skaters move on the friction horizontal surface of the rink.

a. What is the magnitude of Daniels velocity after the collision?

b.What us the direction of Daniels velocity after the colision

ok I know this is a common exercise but..

assuming a perfectly inelastic collision (they stay together after the collision) ...

initial momentum of the system = final momentum of the system

$mv_0 + M \cdot 0 = (M+m)v_f$

$\dfrac{mv_0}{M+m} = v_f$

$v_f$ will be in the same direction as $v_0$
 
  • #3
karush said:
\(\displaystyle 8.27\)

Two ice skaters Daniel (mass \(\displaystyle 65.0\text{ kg}\)) and Rebecca (mass \(\displaystyle 45.0\text{ kg}\)) are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, who is moving at \(\displaystyle 14.0\text{ m/s}\) before she collides with him. After the collision, Rebecca has a initial direction. Both skaters move on the friction horizontal surface of the rink.

a. What is the magnitude of Daniels velocity after the collision?

b.What us the direction of Daniels velocity after the colision

ok I know this is a common exercise but..

As you can see, I've edited your post to remove a whole slew of extraneous formatting BBCodes...if you're going to paste your text from some other environment, please put the editor in "Source Mode" so all those formatting codes either get left behind or you can then edit them out. :)
 
  • #4
MarkFL said:
As you can see, I've edited your post to remove a whole slew of extraneous formatting BBCodes...if you're going to paste your text from some other environment, please put the editor in "Source Mode" so all those formatting codes either get left behind or you can then edit them out. :)

ok but it displays as

View attachment 7823
 
  • #5
This is what I see:

View attachment 7824

My bigger concern though is all the extraneous formatting codes, some of which were embedding inside your $\LaTeX$. I do understand that mobile devices aren't really up to the task of working with forums though.
 

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  • #6
\(\displaystyle 123\)
$123$

not sure what codes you fixed
 
  • #7
karush said:
\(\displaystyle 123\)
$123$

not sure what codes you fixed

There were a bunch of COLOR and FONT tags all over the place that I got rid of. :)
 

FAQ: Ice Skating Collision: Daniel & Rebecca

1. What caused the collision between Daniel and Rebecca during the ice skating competition?

The collision between Daniel and Rebecca was caused by a combination of factors. Firstly, the speed at which they were skating made it difficult for them to quickly change direction or stop. Additionally, the high level of competition and pressure to perform well may have caused them to lose focus on their surroundings and the movements of other skaters on the ice. Finally, a small mistake or misstep by either skater could have easily led to the collision.

2. Were there any injuries sustained by Daniel and Rebecca during the collision?

Yes, both Daniel and Rebecca sustained minor injuries during the collision. They were both evaluated by medical professionals and were cleared to continue competing in the competition. However, the collision did cause some disruption in their performance and ultimately affected their overall score.

3. Could this collision have been prevented?

It is difficult to say definitively whether or not the collision could have been prevented. Skating is a fast-paced and physically demanding sport, and collisions do happen, especially in high-level competitions. However, it is possible that with better communication and awareness of their surroundings, Daniel and Rebecca could have avoided the collision.

4. How common are collisions in ice skating competitions?

Collisions are not uncommon in ice skating competitions, especially at the higher levels. Skaters are often performing intricate and difficult moves at high speeds, which can lead to collisions if they are not careful. However, ice skating competitions have strict rules and regulations in place to minimize the risk of collisions and ensure the safety of all skaters.

5. Did the collision affect the overall outcome of the competition for Daniel and Rebecca?

Yes, the collision did have an impact on the overall outcome of the competition for Daniel and Rebecca. They were both deducted points for the disruption in their performance, and this ultimately affected their final score and placement in the competition. However, they were still able to recover and finish the competition strong, showing their resilience and determination as athletes.

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