# What do you know about angular momentum?

1. Forces cannot change the angular momentum of a spinning object.
True False

2. The angular momentum of a spinning object is affected in the same way by the same force no matter where the force is applied.
True False

3. If there are no outside forces acting on an object, then it's angular momentum is conserved.
True False

4. What is the name of the distance of a spinning object from the axis of rotation?
(A)the hypotenuse
(B)the reference point
(D)the angular distance
(E)the axial length

5. A 2 kg ball is attached to the end of a 1 m string. A man whirls the ball over his head in a circle with a velocity of 4 m/s. What is the angular momentum of the ball?
(A)2 kg m2/sec
(B)4 kg m2/sec
(C)7 kg m2/sec
(D)8 kg m2/sec
(E)none of the above

6. Which is the correct formula for the angular momentum of a spinning object?
(A)(mass) • (velocity)

7. Challenge Question: Where should a force be applied on a spinning object in order to make the greatest impact on the object's angular momentum?
(A)in the center of the object
(B)on the reference point
(C)on the edge of the object
(D)the exact center of the radius
(E)the placement of the force makes no difference

8. Finished? Sneak a peak at the answers and see how you did!

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Bang! Boing! Pop! Interactive Physics on the World Wide Web
Created for Thinkquest 96 by Josh Levine, Paulina Kuo, and Doug Brown