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Help with Angular Momentum

  1. Dec 19, 2008 #1
    Help with Angular Momentum!!!

    I am trying to figure out these questions and i just don't know. So I thought maybe you could help me.

    Thanks

    1: A bolt on a car engine is to be tightened with a torque of 35 Newton meters. If you have a 25 cm long wrench, what force should you exert?
    1.4 N
    1.4 x 102 N
    8.8 N
    8.8 x 10-1 N

    2: Two disks have the same mass, but one (designated as D) has twice the diameter of the other (designated as d). Which would be harder to start rotating?
    D
    d
    They are equally hard to rotate
    Not enough information given


    5: The direction of the rotation of a spinning object can be changed only by applying a(n) ______.
    Force
    Torque
    Velocity
    None of the Above

    6: To relate the Angular momentum of a particle with its linear momentum, you need the particle’s:
    Displacement from the origin
    Distance from the origin
    Velocity vector
    Torque

    7: Mass is an analogous linear quantity to the angular form of:
    Weight
    Torque
    Inertia
    Acceleration

    8: As a gyroscope slows down due to friction, the rate of precession increases due to:
    The direct relationship between angular momentum and precession
    The inverse relationship between inertia and angular acceleration
    The direct relationship between torque and angular acceleration
    The inverse relationship between angular momentum and precession

    9: The heavy rim around a Frisbee is useful because it gives it:
    A large moment of inertia
    A small moment of inertia
    A decrease in the gyroscopic effect
    An increase in it’s precession

    10: An object moving in a circle at constant speed has:
    No acceleration
    Acceleration tangent to the circle
    Acceleration towards the center of the circle
    Acceleration away from the center of the circle
     
  2. jcsd
  3. Dec 19, 2008 #2
    Re: Help with Angular Momentum!!!

    You need to help yourself first before you can expect anyone to help you on this forum. It's the rules. Many of these questions are easy. Did you look at the book?
     
    Last edited by a moderator: Dec 19, 2008
  4. Dec 22, 2008 #3
    Re: Help with Angular Momentum!!!

    I did look at the book. This test is HARD!! I figured out most of the questions but still have three more to go.
     
  5. Dec 22, 2008 #4
    Re: Help with Angular Momentum!!!

    Which ones? Show your work/discuss your thinking for each.
     
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