500 -gr collar C may slide along pole AB. The spring has A an undeformed length of 400.0 mm and a spring constant of 135 N/m. Knowing that the collar is released from rest at A and that C h = 800.0 mm h d = 600.0 mm a) determine the speed of collar at B if there is friction between collar and rod with a coefficient of friction of D B HK = 0.25 Hs = 0.35 b) using the results of part a) determine the speed d of collar at B if there is no friction between collar and rod. NOTE: You may need: de/cose = In(1/cose + tane) Ide/cos20 = tane 30 points