A(n) 0.2 kg object is swung in a vertical circular path on a string 0.1 m long. the acceleration of gravity is 9.8 m/s2 . if a constant speed of 6.38 m/s is maintained, what is the tension in the string when the object is at the top of the circle.

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?