68. REASONING ANDSOLUTIONFrom Newton's second law and the equation: v= v0+ at, we have 0vvFmamt−==a. When the skier accelerates from rest (v0= 0 m/s) to a speed of 11 m/s in 8.0 s, the required net force is 20(11 m/s) 0 m/s(73 kg)1.010N8.0 svvFmt−−===×b. When the skier lets go of the tow rope and glides to a halt (
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