Equation Of Trajectory Projectile Motion — the NEET Physics formula with its derivation, variables, validity constraints and worked solver.
Equation of Trajectory (Projectile Motion) Valid for projectile motion in a uniform gravitational field neglecting air resistance. The angle theta must not be +/- 90 degrees. Express horizontal position as x = u cos(theta) t Express vertical position as y = u sin(theta) t - 0.5 g t 2 Solve the horizontal equation for time: t = x / (u cos(theta)) Substitute t into the vertical equation Negligible air resistance Constant gravity Non-relativistic speeds Believing mass affects the trajectory shape (it cancels out) Confusing the launch angle with the angle of impact Assuming the equation works for vertical launches (theta = 90 deg)