Question: a particle is projected with a velocity u at an angle theta with an inclined plane of inclination theta < 45 degree with the horizontal.

a particle is projected with a velocity u at an angle theta with an inclined plane of inclination theta< 45 degree with the horizontal.
find:
1-net velocity at the time when velocity is parallel to the plane.
2-radius of curvature of the path of projectile when velocity is parallel to the plane.

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