# Vector: Calculate the Value of the Angle

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A catapult on a cliff launches a large round rock towards a ship from a H of 33.0 m above sea level, directed at an angle above the horizontal with an unknown speed v(0). The projectile remains in flight for 6.00 seconds and travels a horizontal distance D of 169 m. Assuming that air friction can be neglected, calculate the value of the angle (in degrees).

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The solution explains and calculates the solution. The expert calculates the value of an angle in vectors.

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Let the projectile is launched at an angle Q(read as theta) with the horizontal and velocity u (==v(0))

First in horizontal direction:

initial velocity = u*cos(Q) = constant

=> u*cos(Q) = D/T

D is the horizontal distance travelled and T is the time of ...

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