1. A variable force given by F (x) = 2x2 + 4x3 + 5x4+ 6 is applied on 10 kg object (a) Find the units of the coefcients 2, 4, 5, and 6 if x is measured in meters and Force is measured in Newton? (b) Calculate the work done by this variable force if the object moves from 2m to 6m? 2. A small block of mass 500 g starts at rest at A, slides to B where its speed is pa = 10 misthen slides along the horizontal surface a distance of 10 m before coming to rest at C. (see the figure below.) (a) Mat is the work of friction along the curved surface? (b) What is the coefficient of kinetic friction along the horizontal surface? (c) What is the acceleration as the block slides between B and C? A 4.0 m |-1o m-|