What is the upward force acting on a skydiver of mass 60 kg who is falling at a uniform speed of 2 m/s?

When the skydiver is falling at uniform (constant) speed, the net force on him is zero by Newton's first law. Therefore the upward force (air resistance plus any other upward force) must exactly balance the downward gravitational force. The weight of the skydiver is W = mg = 60 × 9.8 = 588 N. Hence the upward force acting on him is 588 N.