Problem 1. A tetherball leans against the smooth, frictionless post to which it is attached. The string is attached to the ball such that a line along the string passes through the center of the ball. The string is 1.30 m long and the ball has a radius of 0.160 m with mass 0.470 kg.
Part A: What is the tension in the rope?
Part B: What is the force the pole exerts on the ball?
Problem 2. An 88 N box of oranges is being pushed across a horizontal floor. As it moves, it is slowing at a constant rate of 0.90 m/s each second. The push force has a horizontal component of 20 N and a vertical component of 25 N downward.
Calculate the coefficient of kinetic friction between the box and floor. Express your answer using two significant figures.