• 6 Posts
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Joined 1 month ago
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Cake day: January 25th, 2026

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  • jjjto196vim rule
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    9 days ago

    Fun fact: ctrl+Z does the same thing as u but in 4 more keystrokes because afterwards you have to type fg then press u. :3

    (like and subscrib fr mor facts)






  • jjjtoPhysics@mander.xyzIs this physics correct?
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    13 days ago

    Your equations are correct (although as I said in my other comment 9.81 is the global average but gravity varies by ~0.1 so that’s too many significant figures), but their issue doesn’t have to do with using sloped distance, by which I assume you mean the length of the slope (they don’t as far as I can tell). It says the height change is 2 meters, and they use 2 meters as the distance since that’s the component of the displacement parallel to gravity. The problem is that they didn’t convert mass to weight.

    work = average force • displacement = |average force| * |displacement| * cos(angle between them)
         = component of average force parallel to displacement * |displacement|
         = component of displacement parallel to force * |average force|
    
    weight = force due to gravity = mass * acceleration due to gravity ≈ 5 kg * 9.8 m/s² = 49 N
    
    work = component of displacement parallel to average force * |average force|
         = 2 m * weight
         ≈ 98 Nm
    

  • jjjtoPhysics@mander.xyzIs this physics correct?
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    13 days ago

    Not quite, you have to multiply distance by the force applied to the object (its weight in Newtons), but they’re using its mass (kilograms).

    It’s actually 98 Nm, since weight = mass * gravitational acceleration and g ≈ 9.8 m/s² (you’ll see people give more digits but it actually varies by at most 0.1 m/s² or so depending on where you are).