A 0.40 kg block can slide up and down a rough 10-m-high, 30-m-long slope. At the bottom, a stiff spring with spring constant 800 N/m is compressed 0.50 m and used to launch the block up the slope. The friction force on the block from the slope is 1.2 N. Use g = 10 m/s2. Match the answers with questions. A. the change in spring potential energy (Usp) D. the change in gravitational potential energy (Ug) H. the change in thermal energy (Eth) - the change in kinetic energy (K) A. -100 J B. 36 C. -40 J D. 40 J E. 24 J F. -24 J G. 100 J H. -36 J I. -18 J J. 18 J