navya asked in Science & MathematicsPhysics · 8 months ago

PLS HELP ME IM REALLY DESPERATE AND ON A TIME CRUNCH PHYSICS IS MAKING ME SUICIDAL?

An automobile accelerates from rest at

0.1 m/s^2 for 14 s. The speed is then held

constant for 13 s, after which there is an acceleration of −2.2 m/s^2 until the automobile stops.

What total distance was traveled?

Answer in units of km.

1 Answer

Relevance
  • oubaas
    Lv 7
    8 months ago

    V = a1*t1 = 0.1*14 = 1.4 m/sec

    d1 = a1/2*t1^2 = 0.05*14^2 = 9.8 m

    d2 = V*t2 = 1.4*13 = 18.20 m

    d3 = (0-(V)^2)/2a = -1.96/-4.4 = 0.45 m

    d = (d1+d2+d3)/1000 = (9.80+18.20+0.45)/1000 = 0.0285 km

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