Tutorial: Using energy bar charts for conservation of energy problems E. A skateboarder starts up a 20" slope at 5 m/'s. He immediately trips over a rock, falls and skids on his kneepads up the hill. The coefficient of kinetic friction between the kneepads and the road is 0.3. How far does he slide along the slope before coming to rest? Initial and final situation + forces KE; Ugi Usi Wother AEth KEr Ugr Us F. A 200-g block is pressed against a spring of force constant 1.40 kN/m until the block compresses the spring 10.0 cm. The spring rests at the bottom of a ramp inclined at 60" above the horizontal. Determine how far up the incline the block moves from its initial position before it stops if the coefficient of kinetic friction is 0.400. Initial and final situation + forces KE; Ugi Usi Wother AEth KEr Ugr Us