Idon’t understand how to do these pls

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.

The mantle is made up of which structural zones?

Area around a charged object where the objects can exert a force on another charged objects is an electric