Recollect the past 3!

Determine the horizontal velocity vv with which a stone must be projected horizontally from a point PP, so that it may hit the inclined plane perpendicularly. The inclination of the plane with the horizontal is xx and point PP is at a height hh above the foot of the incline.

Details And assumptions

Take g=10ms2g=10\frac{\text{m}}{\text{s}^2}

h=10 mh = 10\text{ m}

x=45x = {45}^{\circ}

Round off the answer to the nearest integer.

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