general physics

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The highest barrier that a projectile can clear is 18.8 m, when the projectile is launched at an angle of 59.0 ° above the horizontal. What is the projectile's launch speed?

  • general physics -

    do vertical problem with conservation of energy first:
    (1/2) m Vi^2 = m g h
    .5 Vi^2 = 9.81 * 18.8
    Vi = 19.2 m/s initial speed up
    sin 59 = 19.2 / s
    s = 22.4 m/s

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