Recent content by mr_miyagi

  1. M

    Calculating the escape speed and gravity of a planet / moon

    thx for the replies. The teacher didn't specify how many significant figures...
  2. M

    Calculating the escape speed and gravity of a planet / moon

    Problem: One of the asteroids, Ida, looks like an elongated potato. Surprisingly it has a tiny (compared to Ida) spherical moon! This moon called Dactyl has a mass of 4.20x1016kg, and a radius of 1.57x104 meters, according to Wikipedia. Solve: - Find the acceleration of gravity on the...
  3. M

    Problem calculating speed at the top of a loop-the-loop

    I see my mistake. I've divided in the wrong place. Redoing it made get to 147N :D Thanks for the help!
  4. M

    Problem calculating speed at the top of a loop-the-loop

    This is the problem: A 15.0 kg box is slid down a 6.00 meter high ramp to pick up speed to do a vertical loop-the-loop whose radius is 2.00 meters. All surfaces are conveniently frictionless. Part A) asks to find the Speed at the top of the loop-the-loop. Part B) asks to find the Normal...