How high is the snow pile if a kid jumps off it and lands on the ground?

  • Thread starter Drizzy
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In summary, the diagram shows a kid jumping off a snow pile into the ground covered with snow. The problem asks for the height of the snow pile if the ground is at 0 m. Using the equation S=v0t+(at²)/2, the kid is at its highest point when the velocity is zero and t=0.4 seconds. However, the velocity should be negative when the kid is headed downwards. Additionally, the kid reaches the top of the layer of snow, not the ground itself.
  • #1
Drizzy
210
1

Homework Statement


The diagram shows a kid jumping off a snow pile into the grown that is also covered with snow. So the kid is jumping up and then lands on the ground.
https://scontent-arn2-1.xx.fbcdn.net/hphotos-xpf1/v/t34.0-12/12380374_1234806623215387_1066477107_n.jpg?oh=fe84392440a1ddbf0eebf557109d56ec&oe=5677CAA8
The question is: how tall is the snow pile if the ground is 0 m?

Homework Equations



S=v0t + (at^2)/2

The Attempt at a Solution


I am thinking that the kid is at its highest point when the velocity is zero and t=0.4. It takes 0.4 seconds up and also 0.4 seconds down to the level where the snow pile was at. so the snow piles height is from 0.8 seconds to 1,2 seconds. 1.2-0.8=0.4
s= -4*0.4 + (9.82 * 0,4^2)/2 = - 0,8144

What went wrong in my assumptions or solution?

upload_2015-12-19_14-42-36.png
 
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  • #2
If it's headed downwards, you are denoting this as a negative velocity, so g in your equation will likewise be negative.
 
  • #3
Also, when the velocity is at its most negative point, that's when the kid reaches the top of the layer of snow that's on the ground, not the ground itself. Ponder the finish of the velocity vs time graph.
 

1. What are the potential risks of jumping off a snow pile?

The main risk of jumping off a snow pile is the potential for injury. Snow can be unpredictable and unstable, making it easy to slip, fall, or twist an ankle. Additionally, the height of the snow pile can increase the risk of injury upon impact.

2. Can jumping off a snow pile cause concussion?

Yes, jumping off a snow pile can potentially cause a concussion. If you land on your head or hit your head on the snow pile, it can result in a concussion. It is important to be cautious and aware of the height of the snow pile and the force of impact when jumping off.

3. Is it safe to jump off a snow pile onto hard ground?

No, it is not safe to jump off a snow pile onto hard ground. The impact can cause serious injuries such as broken bones or sprains. Always make sure to jump onto a soft and cushioned surface, such as snow or a landing pad, to minimize the risk of injury.

4. Are there any precautions to take before jumping off a snow pile?

Yes, there are a few precautions to take before jumping off a snow pile. First, make sure the snow pile is stable and not too high. Wear proper footwear with good traction to avoid slipping. Also, it is important to warm up and stretch your muscles before jumping to avoid muscle strains or pulls.

5. Can jumping off a snow pile improve my athletic performance?

While jumping off a snow pile can be a fun and exhilarating activity, it is not necessarily a beneficial training or exercise method. If you are looking to improve your athletic performance, there are other more effective and safer methods to do so. Consult with a fitness professional for personalized and safe training recommendations.

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