Energy $ Work Chegg : Do not answer ! This is an exam , and that interferes K= SOON( with learning and assessment . AX : 7 K = SOON AX= Rometers 6 8m Mxit= 0.15 8 m Ax = you choose a) The 200 kg box starts at rest. The spring is compressed 20 meters. Calculate the speed of the box after the spring is released ( PE = = Kx?). Calculate the speed of the box after it goes & meters up the hill/ramp . Chegg: Do not answer! This is an exam. Calculate the speed after another & meters d Choose the length of the friction area such that ( use two decimal places) the speed afterwards is less than 6m/s . Is the 200 Kg box finishes at rest, how far did the spring compress ? Chegg : Do not answer ! It interferes with learning and assessment . un The friction did negative work ( took away KE ) on the 200 ky box, but where did that energy go ? Is friction a conservative force