eliza44 eliza44

01-11-2021
Physics

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The highest barrier that a projectile can clear is 12.7 m, when the projectile is launched at an angle 19.0° above the horizontal. What is the projectile's launch speed?

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chibunduoyibe chibunduoyibe

01-11-2021

Explanation:

h=((usinx)^2)/2g

12.7=((usin(19))^2)/(2×9.8)

(12.7×2×9.8)=(usin(19))^2

248.92=(usin(19))^2

usin19 =√248.92 =15.78

U =15.78/(sin19)

=48.46m/s----> speed

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