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    KenzO18's Avatar
    KenzO18 Posts: 1, Reputation: 1
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    Nov 8, 2011, 09:17 PM
    Physics answers?a mountain cimber is sranded on a ledge 30m above the ground. Rescuer
    A mountain cimber is sranded on a ledge 30m above the ground. Rescuers on the ground want to shoot a projectie to him with a rope attatched to it. If the projectie is directed upwards at an initial ange of 55-degrees from a horizontal distance of 50m, determine the initial speed the projectile must have in order to land on the ledge
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    Unknown008 Posts: 8,076, Reputation: 723
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    Nov 8, 2011, 10:20 PM
    Make a sketch of the situation.

    The horizontal displacement component of the projectile is given by:


    The vertical displacement component of the projectile is given by:


    s_v must be 30 m, s_h must be 50 m. Get an equation of t in terms of v in the first equation, substitute that into the second equation and solve for v.
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