A 68 kg diver jumps off a platform and strikes the water at a speed of 14.7 m/s, then slows to a stop underwater in 0.35 s. What force does the water exert on the diver?

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.