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March 27, 2017

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if a car generates 18 hp when traveling at a steady 88 km/h, what must be the average force exerted on the car due to friction and air resistance

  • physics - ,

    If the proper units are used (Watts, m/s and newtons, for example),
    Power = Force * Velocity

    First convert to SI units:
    88 km/h = 24.44 m/s
    18 Hp = 13,428 Watts

    Force = P/V = 549 newtons

  • physics - ,

    13,428/24.4= 5.5x10^2N

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