A car of mass 750 kg has an initial speed of 75 mph. Traveling in a straight line, its speed is increased uniformly to 120 mph in 2.0 miles.

Question

A car of mass 750 kg has an initial speed of 75 mph. Traveling in a straight line, its speed is increased uniformly to 120 mph in 2.0 miles. What is the net force that was exerted?

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Ladonna 5 years 2021-09-02T11:15:17+00:00 1 Answers 17 views 0

Answers ( )

  1. Delwyn
    0
    2021-09-02T11:16:46+00:00
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    Explanation:

    ESTE PROBLEMA ES MEJOR HACERLO EN SI. PRIMERO CONVIERTES

    LA VELOCIDAD INICIAL Y LA VELOCIDAD FINAL A m/s

    v_{0} = 33.52 m/s      v = 53.67 m/s      x = 3220 m

    PRIMERO ENCUENTRAS LA ACELERACIÓN DEL COCHE CON LA ECUACIÓN

    DE GALILEO GALILEI

    a = (53.67 m/s)^{2} - (33.52 m/s)^{2}/3220 m = 0.5453 m/s^{2}

    AHORA CON LA ACELERACIÓN USMOS LA SEGUNDA LEY DE NEWTON

    F = 75 kg(0.5453 m/s^{2}) = 40.9 N

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