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March 29, 2017

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a car is driven off the edge of that is 54.0 m high. the point of impact is 130m from the base of the cliff. how fast was the car traveling in (miles/hr) when it went over the cliff?

  • physics - ,

    How long to fall ?

    54 = (1/2) g t^2
    108 = 9.81 t^2
    t = 3.32 seconds in the air, screaming and wishing for parachute

    In 3.32 seconds we went 130 meters at constant horizontal velocity u

    130 = t (3.32)
    t = 39.2 m/s

    so now convert that to miles/hr. (Google). 87.7 miles/hr it says

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