thanks for that.
hmmm- I am assuming the angular momentum in both cases is the same.
I worked out the moment of inertia of the object at the bigger radius.
I = mr /2
(0.870)(7.8/2)
52.9308
angular momentum = (52.9308)(9.85)
= 521.37
any idea on where to go from here??
A small 0.870-kg object moves on a frictionless horizontal table in a circular path of radius 7.80 m. The angular speed is 9.85 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of the circle. Someone under the table begins...