Karen Rico,HowGan

Her goal is to pass a balloon through a small hoop mounted on the observation platform at the top of the Eiffel Tower, 276 m above the ground.

a. If the balloon is to pass through the hoop at the peak of its flight, at what angle above horizontal should she launch the balloon?

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3 months ago 2

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  1. ignoramus
    Best Answer
    Track

    Vertical component of velocity = 90 sin θ

    Velocity must be 0 at a height of 276m

    From v² = u² + 2as, → 0 = u² - 2 · (9.81) · 276

    from which u = 73.587

    hence 90 sin θ = 73.587

    sin θ = 73.587 / 90 = 0.8176

    therefore θ = 54.9°

  2. Steve

    From y = [V*sinΘ]²/(2g) I get

    sin²Θ = 2gy/V² = 0.6678 →

    Θ = 54.8°

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