= A block (m = 4kg) slides on an inclined surface (0 30) and is connected on one side to a spring (k = 50N/m). The coefficient of kinetic friction between the block and the incline is 0.2. The block is initially set in 4 kg k W 50N 30 motion with a speed of 3m/s (down the incline) with the spring relaxed. a) Identify the conservative force(s) impacting the motion of the block. [1] b) Find the maximum extension of the spring. [7] c) Find the work done on the block by the gravitational force from when the spring is relaxed to when it extends by 10cm. [2]