A freshman smart alek lips off onces too often! The assistant principle loses her cool and grabs the 38.0kg punk by the hair- swinging him in a vertical circle of radius 1.20m! if the freshman is moving at 6.30m/s at the bottom of the swing, calculate:
A) the tensions in the punks hair at the bottom of the path
B) the tension at the top of the arc when he is moving at 5.70 m/s
C) the minimum speed needed for the punk to remain in this vertical circle