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Cake day: January 1st, 2024

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  • ji17br@lemmy.mlto196@lemmy.blahaj.zonePhysics rule
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    2 months ago

    You want to figure out distance per second. One way to do this is calculate distance apart at t=0,1,2…

    The difference between each point would be the average speed over that second.

    Using sqrt(b2+g2):

    t0 = 0 t1 = 1.554m
    s1 = (1.554m-0m)/1s = 1.554m/s t2 = 3.108m
    s2=(3.108m-1.554m)= 1.554m/s

    As you continue this you will see they travel at a constant speed apart from each other. The reason this is working is because you need to divide distance by time. Dividing by 1 second won’t change the value of the number after you subtract. If you notice you can do (t2-t0)/2s and also get the same answer.



  • ji17br@lemmy.mlto196@lemmy.blahaj.zonePhysics rule
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    2 months ago

    It’s the difference of distances apart over time. Aka how fast bf is moving away from gf, aka what the question is asking for.

    Yes, if you want to be pedantic, velocity a vector with direction, so I guess you’d have to frame the question relative to either the boyfriend or girlfriend, but I don’t think the difference between speed and velocity is part of the question.














  • ji17br@lemmy.mltoFacepalm@lemmy.wtfWhat are those signs?
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    3 months ago

    You clearly don’t live in Canada. Imperial units are very common for measurements. You ask nearly anyone, old or young, their height or weight, you’re getting an answer in feet/inches or pounds respectively.

    Tons of baking is done using cups, tsp, tbsp etc.

    Golfers use yards.

    I’m sure there are more examples I am forgetting, but you get the idea. It’s not just people who grew up before 1985. It’s everyone.