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Physics

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A 1400-kg car rounds a curve of 57-m banked at an angle of 14 degrees.

If the car is traveling at 98-km/h (27-m/s), will a friction force be required? If so in what direction?

How much friction force will be required?

  • Physics -

    Let the x-axis point toward the center of curvature and the y-axis point upward. Use Newton’s second law.
    ΣFy = N• cosθ − mg − f •sinθ = 0 ...(1)
    ΣFx = N• sinθ + f •cosθ = m•v²/R,....(2)
    Solving the 1st equation for N, we obtain
    N =( f •sin θ + m•g)/cos θ,
    Substitute N to the 2nd equation and obtain friction force
    f =m[(v²•cosθ/R) - g•sinθ].

  • Physics -

    f=[fy.fx].N

  • Physics -

    this sucks. no help at all

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