A car drives with a constant acceleration of 6.0 m/s2. If it begins with a velocity of 8.0 m/s, and travels a displacement of 120 m, how much time will this elapse?
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Expert's answer
2011-11-22T08:10:30-0500
we use standard formula for motion with cinstant acceleration S=S0+V0t+at2/2 120=8t+3t2 solving this equation we obtain t1=5.13 t2=-7.8 as along as it's time it can't be negative thus answer is t=5.13s
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