A body of mass 1.00 kg is tied to a string and rotates on a horizontal
PHYSICS · Multi-part · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
A body of mass 1.00 kg is tied to a string and rotates on a horizontal, frictionless table.
(a) The length of the string is 40.0 cm, and the speed of revolution is 2.0 m s−1 . Calculate the tension in the string.
(b) The string breaks when the tension exceeds 20.0 N. Determine the largest speed at which the mass can rotate.
(c) The breaking tension of the string is 20.0 N, but you want the mass to rotate at 4.00 m s−1 . Determine the shortest length of string that can be used.