Sam, whose mass is 79 kg, takes off accross level snow in his jet powered skis. The skis have a thrust of 209 N and a coefficient of kinetic friction...

Sam, whose mass is 79 kg, takes off accross level snow in his jet powered skis. The skis have a thrust of 209 N and a coefficient of kinetic friction on snow of 0.1. Unfortunatately, the skis run out of fuel after only 12 s.