A 76.5-kg skydiver reaches a terminal speed of 58.7 m/s with her parachute undeployed. Suppose the drag force acting on her is proportional to the speed squared, or Fdrag = kv^2.

(a) What is the constant of proportionality k? (Assume the gravitational acceleration is 9.8 m/s2.)

(b) What was the magnitude of the acceleration when she was falling at half terminal speed?

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