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1 March, 17:14

A car moving at 50 km/h skids 15 m with locked brakes. How far will the car skid with locked brakes at 150 km/h

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  1. 1 March, 17:47
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    with 50 km/h = 15m skid

    so, 150 km/h = 45m skid

    multiply sides by 3, make them proportional to each other!
  2. 1 March, 19:27
    0
    Kinetic energy = (1/2 m) x (speed) ²

    A car moving 3 times as fast has 9 times as much kinetic energy.

    If the force of friction between the tires and the ground

    is the same at every speed, then the car has to go 9 times

    as far to burn off the increased kinetic energy.

    9 x 15m = 135 meters
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