A 56-kg student runs at 5.0 m/s, grabs a dangling rope, and swings across a lake (figure). He lets go of the rope when his velocity is zero. a) What is the angle when he lets go of the rope? b) What is the tension in the string just before he releases it? c) What is the maximum tension in the string? (290; 480 N; 690 N.) 100m