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7 February, 23:16

A car of mass 1400 kg travelling at 15 m/s goes over a circular arc-shaped bump in the road. if the radius of the arc is 40 m, what is the normal force on the car as it is passing the top of the arc?

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  1. 8 February, 00:03
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    The car on the top of the arc;

    m = 1,400 kg, v = 15 m/s, r = 40 m;

    The normal force:

    F n = m g - m v ² / r =

    = 1,400 kg · 9.8 m / s² - (1,400 kg · (15 m/s) ² : 40 m) =

    = 13,720 N - 7,875 N = 5,845 N

    Answer:

    B) 5,800 N
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