If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

Answer ( slope);

Since the pully is a simple machine so the mechanical advantage is a 1

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other