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7 November, 10:37

A car heading north collides at an intersection with a truck heading east. if they lock together and travel 28 m. s at 46 degrees north of east just after the collision, how fast was the car initially traveling? assume that the two vehicles have the same mass.

A) 30 m/s

B) 80 m/s

C) 20 m/s

D) 40 m/s

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Answers (1)
  1. 7 November, 11:35
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    C) 20 m/s

    Explanation:

    The collision of the car and truck will give a single resultant velocity due to equal masses.

    We'll treat this question as a vector question.

    The velocity profile will form a right angle triangle.

    To calculate the velocity of the car

    Let the velocity be x

    Sina = x/28

    Sin46 = x/28

    0.7193*28 = x

    20 = x

    X = 20 m/s
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