- 61 A Mass Of 500 G Is Attached To A Cord Passing Through A Small Hole In A Frictionless Horizontal Surface Figure P11 1 (270.79 KiB) Viewed 63 times
61 A mass of 500 g is attached to a cord passing through a small hole in a frictionless, horizontal surface (Figure P11.55). r The mass is initially orbiting with speed 1.50 m/s in a circle of radius 0.300 m. The cord is then slowly pulled from below and the radius of the circle decreases to 0.100 m. (a) What is the speed of the mass when the radius is 0.100 m? (b) Find the tension in the cord (as a function of r). (c) How much work is done in moving m from 0.300 m to 0.100 m? (Note: the tension depends on r). (a) 0.866 m/s; (b) 1.13/r N; (c) 0.375 J a. b. (a) 4.50 m/s; (b) 1.13/r N; (c) 4.50 J C. (a) 4.50 m/s; (b) 0.101/P N; (c) 4.50 J d. (a) 0.866 m/s; (b) 0.101/r N; (c) 0.375 J correct: C