1. The problem statement, all variables and given/known data Sam, whose mass is 80kg, takes off across level snow in his jet powered skis. The skis have a thrust of 189N and a coefficient of kinetic friction on snow of 0.1. Unfortuneately, the skis run out of fuel after only 12s. 2. Relevant equations F=ma kinematic equations 3. The attempt at a solution I have no idea where to even begin with this problem.