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?

3 answers

NONE, there is no motion in the direction of the string tension. It continues at the same speed forever.

thanks