Recent content by Joe seki

  1. J

    B How does the size of pool balls affect the amount of force needed for a shot?

    A=Cueball start position CP=Centre Point where balls collide B=The pocketHey guys, I was asked this question that seems completely obvious but I keep second guessing myself over it, I have included a basic picture to explain what I’m about to describe Say you were to take the above pool...
  2. J

    B Thought experiment (debate with friend)

    Sorry for the late reply, I would like to thank you all for the very informative responses. My friend has read your replies and insists you are mistaken and had sent me 2 (badly drawn) diagrams proving he is correct lol I will add them below, he said in the first one the bricks go inside the...
  3. J

    B Thought experiment (debate with friend)

    Thought experiment. Let's suppose I lay bricks around the entire Earth going up 50 miles in height. I am assuming this way there's going to be more bricks at the top than at the bottom right? Well... What If I was to get a football/soccer pitch (100meters in length and concreted with spirit...
  4. J

    I Confirm 6ft Tall Boy Throwing Tennis Ball 🎾 in Gym

    My bad 🤦🏻 The question was proposed meaning the ball travels 20 feet from release, so can disregard the distance of the boys hand to the ground :) Anyone able to offer an answer and short explanation so I can see where I went wrong Thanks 🙏
  5. J

    I Confirm 6ft Tall Boy Throwing Tennis Ball 🎾 in Gym

    Just tried again, 2.2 can’t be right...where am I going wrong hahaha s = ut + ½at s = 6m u = 0 a = 9.81 m/s² Rearrange gives: s / ½g = t² 6/4.4 = 1.3² Root = 1.1 s up 1.1 seconds down. 2.2 seconds
  6. J

    I Confirm 6ft Tall Boy Throwing Tennis Ball 🎾 in Gym

    Thanks for the fast response 😃 Sorry if this is messy lol Here’s my workout out As acceleration of the throw is not stated, I will assume it is 0.5m/s is shall name "a". 20 ft is 6 meters which shall be labeled "S" I want to find time in seconds. I shall label "t" Equation required: S = ut...
  7. J

    I Confirm 6ft Tall Boy Throwing Tennis Ball 🎾 in Gym

    Hello I’m hoping someone could help I was asked by a fellow student the following question A 6 foot tall boy is stood in his schools gymnasium, he throws a standard full-size tennis ball 🎾 up in the air to the height of 20 feet and it lands back into his hand at the same distance from the...
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