Sam, whose mass is 66.0kg, takes off down a 55.0m high, 11.0 degree slope on his jet-powered skis. The skis have a thrust of 190N. Sam's speed at the bottom is 38.0 38m/s. What is the coefficient of kinetic friction on his skees. I dont understand why they put a slope or velocity in. So what would the base equation be for solving this.