Physics

Problem

A rocket sled starts from rest on a straight track. Its acceleration is +6 m/s² for the first 4.0 s and then –3 m/s² for the next 3.0 s. What is the sled’s total displacement during the entire 7.0 s run? a)

1.07\times 10^{2}\,\text{m}

1.20\times 10^{2}\,\text{m}

8.55\times 10^{1}\,\text{m}

1.34\times 10^{2}\,\text{m}

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