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PE = mgh KE = 0.5mv2​

(10pts): A toy car rolled off a ramp that was 2.5m high.What was the car’s velocity when it exited the ramp?

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    Lv 7
    2 months ago

    kinetic energy = potential energy

    (1/2)mv² = mgh

     

    Cancel m

    (1/2)v² = gh

     

    multiply both sides by 2

    v² = 2gh

     

    Plug in g = 9.8 and h = 2.5

    v² = (2)(9.8)(2.5)

    v² = 49 

     

    Take the square root of both sides

    v = 7 m/s <––––

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