Just as a skydiver steps out of the helicopter, someone who’s watching starts a stopwatch. so the time is zero as the skydiver steps out of the plane. what is the skydivers downward velocity at that instant, just before starting to fall

Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.