quiz8

  1. An object that weighs 500N goes in a circle of 10.00m DIAMETER in 3.00s. What is the centripetal acceleration, centripetal force, and angular speed of the object? ANSWERS IN ORDER AS ASKED.
    a) 87.72m/s^2, 2238N, 2.094Rad/s
    b) 9.80m/s^2, 559.5N, 8.770Rad/s
    c) 32.70m/s^2, 500N, 4.385Rad/s
    d) 21.93m/s^2, 1119N, 2.094Rad/s
    e) 43.86m/s^2, 1.10E4N, 4.188Rad/s
    No answer given yet
  2. A planet has ten times the radius of the Earth and twice the mass. What is the acceleration due to gravity at the surface of the planet and at one of the planets radius above its surface?
    a) 0.196m/s^2, 0.049m/s^2
    b) 1.960m/s^2, 0.490m/s^2
    c) 49.00m/s^2, 12.25m/s^2
    d) 24.5m/s^2, 6.13m/s^2
    e) 1.96m/s^2, 0.980m/s^2
    No answer given yet
  3. The radius of the Earth is about 6400km. What speed is required to place an object in circular orbit just at (just skimming above) the planets surface in problem 2?
    a) 1.24E4m/s
    b) 1.12E4m/s
    c) 5.60E4m/s
    d) 3542m/s
    e) 1120m/s
    No answer given yet