Case II Projection in upward direction with some angle with horizonta Vertical mirror sign convention   Horizontal Mirror  x = (u cosq) t Case III Projection in downward direction with some angle with horizontal Vertical Mirror   Horizontal Mirror  Projectile along inclined plane For Simplicity & understanding  Vertical Mirror

V = u - g t

O = u sin b - (g cosa) t   Horizontal Mirror  OB = OA Cos a

Special case of Projectile Motion Case I

(i) Time of flight  let OQ ® x -axis

OP ® y –axis

ux = u

uy = 0

ax = - g sin b

ay = - g cos b

Now

Vx = ux + axt

O = u – g sin bt (ii) Final velocity V

Vy = uy + ay t

V = 0 – g cos b V = u cot b

(iii) Height h    Now

h = Sy sin a (iv) Distance AB     Now       Case 2

(i) Time after which V1  ^ V2

Ball 1 Ball 2 Now  g2 t2 = u1 u2 (ii) gap between the ball 1 and ball 2 at the time Ball 1   x1 = u1 t,  Ball 2

x2 = - u2t  Gap between Ball 1 and Ball 2  Gap  = (u1 + u2) t Case 3 Collision of two projectile    Join any of the batches using this book

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