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8 July, 11:58

A van traveling down a slope with a uniform acceleration of 2.15 meters/second2 attains a speed of 20.00 meters/second after 7.00 seconds. What is the initial velocity of the van?

a. 0.00 meters/second

b. 3.65 meters/second

c. 4.95 meters/second

d. 35.05 meters/second

e. 120.75 meters/second

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Answers (1)
  1. 8 July, 14:26
    0
    Final velocity = initial velocity + (acceleration*time)

    That is v = u + at

    So 20 = u + (2.15*7)

    20 = u + 15.05

    Thus, u = 20 - 15.05

    = 4.95 meters/second

    that is C
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