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The highest barrier that a projectile can clear is 14.5 m, when the projectile is launched at an angle of 31.0 ° above the horizontal. What is the projectile's launch speed?

  • Physics -

    Only the vertical component of velocity coverts to gravitational potential energy at maximum height H.

    (Vo sin31)^2 = 2 g H = 284.2 m^2/s^2
    Vo sin31 = 16.86 m/s
    Vo = 32.7 m/s

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