Question

A stone with a mass of 1.0 kg is tied to the end of a light string which keeps it moving in a circle with a constant speed of 4.0 m/s on a perfectly smooth horizontal tabletop. The radius of the path is 0.60 m. How much work does the tension in the string do on the stone as it makes one-half of a complete circle?

Answer 1

0 J

Step-by-step explanation:

According to the work-energy theorem, the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle. Since the speed of the stone is constant, there is no change in its kinetic energy. Therefore, the tension in the string does not do any work.