A projectile is launched from point 0 on horizontal ground, landing at the point A. a. OA

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A projectile is launched from point 0 on horizontal ground, landing at the point A.

a. OA = 205m, 0 = 40°. Find the speed u.

b. θ = 30°, u = 32ms-1. Find the range OA.

c. OA = 130m, u = 40m s-1. Find the possible angles of projection θ. 

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