Assertion (A) The velocity of a projectile at a point on its trajectory is equal to the slope at that point. Reason (R) The velocity vector at a point always along the tangent to the trajectory at that point.

Step-by-step solution

Trajectory of a projectice is of form aligned & y=f(x)=x - g x^2 2 u^2 ^2 & d y d x = slope = d y / d t d x / d t = v_y v_x aligned So, Assertion (A) is incorrect. Also, velocity of a projectile is always along tangent to the trajectory (shown) Hence, reason (R) is correct.