Tap for spoiler

The bowling ball isn’t falling to the earth faster. The higher perceived acceleration is due to the earth falling toward the bowling ball.

  • pumpkinseedoil@mander.xyz
    ·
    14 days ago

    Why your spoiler is wrong:

    The gravitational force between two objects is G(m1 m2)/r²

    G = ~6.67 • 10^-11 Nm²/kg²

    m1 = Mass of the earth = ~5.972 • 10^24 kg

    m2 = Mass of the second object, I'll use M to refer to this from now on

    r = ~6378 • 10^3 m

    Fg = 6.67 • 10-11 Nm²/kg² • 5.972 • 1024 kg • M / (6378 • 10^3 m)² = ~9.81 • M N/kg = 9.81 • M m kg / s² / kg = 9.81 • M m/s² = g • M

    Since this is the acceleration that works between both masses, it already includes the mass of an iron ball having a stronger gravitational field than that of a feather.

    So yes, they are, in fact, taking the same time to fall.

    • red@lemmy.zip
      ·
      14 days ago

      the fact that you got upvoted, you clearly said force on both objects is gM and the feather or ball will move with g BUT earth will move with gM/m1 which is more in case of ball, and no its not acceleration between mases, its the force experiencec by both mases so, fg=m1.a