Suppose the stone is thrown at an angle of 33.0° below the horizontal from the s

Question

Suppose the stone is thrown at an angle of 33.0° below the horizontal from the same building(h = 43.0 m) as in the exampleabove. If it strikes the ground 49.9 maway, find the following. Find the time of flight? the initial speed? speed and angle of the velocity vector with respect to thehorizontal at impact ? Any help as to how i start this problem would be great i amcompletely lost! Suppose the stone is thrown at an angle of 33.0° below the horizontal from the same building(h = 43.0 m) as in the exampleabove. If it strikes the ground 49.9 maway, find the following. Find the time of flight? the initial speed? speed and angle of the velocity vector with respect to thehorizontal at impact ? Any help as to how i start this problem would be great i amcompletely lost!

Explanation / Answer

= 33.0o, h = 43.0 m, d = 49.9 m x = v0cos*t, so t = x/(v0cos) y = v0sin*t - gt2/2 = x*tan -0.5g*[x/(v0cos)]2 now y = -h, x = d -h = d*tan -0.5g*[d/(v0cos)]2 -43.0 = 49.9*tan(33.0) -0.5g*49.92/[v02*cos2(33.0)] v0 = 15.2 m/s t = d/(v0cos) = 3.91 s ' = tan-1[(v0sin -gt)/(v0cos)] = -67.0o

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