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7 June, 23:17

I know that this is a lot to ask for but I am really struggling with these and my teacher is sub-par, feel free to assist with as many or as few as you want, I really appreciate it.

A cyclist accelerates down a hill from rest at 1.5 m/s2. Assuming the acceleration is uniform, how long is required to reach a velocity of 6 m/s?

A cannon ball is thrown straight down from a tower with an initial velocity of 50 m/s. After 2.0 s, what is its final velocity?

What height will be reached by an arrow shot straight up at an initial velocity of 15 m/s? (Ignore air resistance.)

A cyclist, riding at a constant speed of 5.0 m/s, sees a flash of lightning. Wanting to get home quickly, she accelerates at 1.0 m/s2 for 4.0 s and then rides at a constant speed for 30.0 s. If she then takes a further 12.0 to slow down uniformly to rest, the total distance traveled after seeing the lightning flash is ...?

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Answers (1)
  1. 7 June, 23:36
    0
    The answers are below

    Explanation:

    1.-

    Data

    vo = 0 m/s

    t = ?

    vf = 6 m/s

    a = 1.5 m/s²

    t = vf / a

    t = 6 / 1.5

    t = 4 s

    2.-

    Data

    vo = 50 m/s

    t = 2 s

    vf = ?

    g = 9.81 m/s2

    vf = vo + 'gt

    vf = 50 + (9.81) (2)

    vf = 50 + 19.62

    vf = 69.62 m/s

    3.-

    Data

    height = ?

    vo = 15 m/s

    g = 9.81 m/s

    vf = 0 m/s

    h = vo² / 2g

    h = 15² / (2 x 9.81)

    h = 225 / 19.62

    h = 11.46 m
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Home » Physics » I know that this is a lot to ask for but I am really struggling with these and my teacher is sub-par, feel free to assist with as many or as few as you want, I really appreciate it. A cyclist accelerates down a hill from rest at 1.5 m/s2.
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