*Username: manvi*

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- A particle is projected from the top of a hill with a speed of 20 m/s at an angle of 30 with horixontal. Find the radius of curvature of its trajectory at t= 4 sec.
- Plzz help ..i m stuck badly.......A particle is projected in air from origin wiyh speed u and at an angle Q with positive x axis . At its maximum height its trajectory has radius of curvature R and centre of curvature has coordinate (20,70/3)m . Find the equation of trajectory, maximum height of projectile , value of i & Q.