4. Which of the following are needed for a value to be a vector? Select all that apply. direction O magnitude composition O angle​

Carbon 14 is a naturally occurring stable

What is the coefficient of kinetic friction μk between the block and the tabletop?

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.