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March 25, 2017

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A motorcycle traveling 91.0 km/hr approaches a car traveling in the same direction at 83.0 km/hr. When the motorcycle is 52.0 m behind the car, the rider accelerates and passes the car 16.0 s later. What is the acceleration of the motorcycle (in meters/second^2)?

  • physics - ,

    Easy way: relative motion
    relative initial speed: (91-83)km/hr=8km/hr= 2.2222 m/s

    distancerelative=virelative*time+1/2 a t^2

    52=2.22*16+1/2 a (256)

    solve for a.

    Harder method:
    find the distance the slow car goes in 16 seconds: (velocity*time)
    find the distance the fast car must go (above+ 52)
    then
    that distance=Vi*16 + 1/2 *256 a
    check my thinkikng.

  • physics - ,

    .28

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