Mechanics Problem...have spent over 4hrs trying to do this...plz help?

  • Thread starter Thread starter alex
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alex

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Wiley Coyote (Carnivorous hungribilous) is chasing the Roadrunner (Speedibus cantcatchmi) yet again. While running down the road, they come to a deep gorge, 15 m straight across and 100 m deep. The Roadrunner launches itself across the gorge at a launch angle of 15° above the horizontal, and lands with 1.5 m to spare. (a) What was the Roadrunner’s launch speed? Ignore air resistance. (b) Wiley Coyote launches himself across the gorge with the same initial speed, but at a different launch angle. To his horror, he is short the other lip by 0.5 m. What was his launch angle? (Assume that it was lower than 15°.)

I have done part a to give an answer of 18m/s

b i cannot do for the life of me...please help it feels like i have tried everything
 
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