physics

posted by .

In order to change the angular momentum of an object, it is necessary to apply
a. a net force to the object.
b. a net torque to the object.
c. a centripetal acceleration to the object.
d. both a net force and a net torque to the object.




We have three vectors, labeled A, B, and C. A points due west, B points due north, and C points due east. We don’t know their relative magnitudes. We find the cross product of each of these vectors with a vector which points due south (D). Rank the three cross products ( ) from smallest to largest in terms of their vertical component, taking the sign of the component into account.
g. You cannot tell with the given information

  • physics -

    To change angular momentum requires a moment(torque)

  • physics -

    LOL, yes you can tell
    first B X D
    the angle between B and D is 180, and the sine of 180 is zero
    therefore B X D = 0
    that was easy

    Now A X D
    rotation from A to D is + 90 degrees, so A X D is UP, positive

    But C X D
    rotation from C to D is negative 90 degrees, cross product down
    C X D is DOWN, negative
    Thus
    in order
    CXD negative
    BXD zero
    AXD positive

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    Under what condition can a force act on an object and yet do no work on that object?
  2. Physics

    There is a net net torque that is applied to a rigid object. What happens?
  3. IPC SCIENCE

    You see an object accelerate towards the left. Which of the following statements is correct?
  4. physics

    true or false If a net force acts on an object, the object's speed will change. An object's velocity will change if a net force acts on the object. If two object have the same acceleration, they are under the influence of equal forces. …
  5. physics

    At the instant the displacement of a 2.00 kg object relative to the origin is d = (2.00 m) + (4.00 m) - (3.00 m) , its velocity is v = - (5.50 m/s) + (2.90 m/s) + (3.20 m/s) , and it is subject to a force F = (5.70 N) - (7.80 N) + …
  6. physics

    the object is traveling in a circle,which one of the statements are true. choose all that apply?
  7. physics- MC QUESTIONS

    Q 1: which of the following conditions occur when an object is in static equilibrium ?
  8. physics PLEASE HELP

    1.state the mathematical relationship between the net force acting on an object and the object's change in momentum. 2state the mathematical relationship between the net force acting on an object and the time taken to change the object's …
  9. Physics

    Am I correct? Which statement explains why a bicycle is stable when a rider pedals quickly?
  10. Physics

    Multiple Choice. If all of the forces acting on an object an object are balanced (net force is zero), then: a. The object's speed will decrease b. The object's direction of motion can change, but its speed cannot C. The object is ecperiencing …

More Similar Questions