A 0.50-kg mass is attached to a light string and moves in a…
A 0.50-kg mass is attached to a light string and moves in a circle of radius 0.80 m on a frictionless horizontal surface with an angular speed of 2.0 rad/s. The string is slowly pulled inward so that the radius decreases to 0.40 m. What is the new angular speed of the mass? (I = mr^2)