A box of weight 220 N is being pulled to the right by a pulling force F of magnitude 30 N. The coefficient of static friction between the box and the floor is 0.15. To make an accurate free-body diagram of the box, the letter W in the diagram below should be replaced with the label . *

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.