6.1 Exercise 8

A 30.0-kg girl in a swing is pushed to one side and held at rest by a horizontal force $\overset{\rightarrow}{F}$ so that the swing ropes are $30.0 °$ with respect to the vertical. (a) Calculate the tension in each of the two ropes supporting the swing under these conditions. (b) Calculate the magnitude of $\overset{\rightarrow}{F} .$