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`        as shown in the figure two identical balls strike a rigid wall with equal speeds but at different angles they are reflected back without loss of speed the ratio of impulse imparted by the two balls on the walls isA sin@Cos@ Cosec@ Sec@`
one year ago

Arun
23331 Points
```							Let the angle of incidence of ball 1 onto the wall be = ALet the angle of incidence of the ball 2 be = BLet the speed of the balls just before striking the wall = vThe velocity vectors (incident and reflected) are resolved along the normal to the wall and along the wall.For the change in velocity of ball 1 = vf - vi       = (v cos A j + v sin A i) - (v sin A i - v cos A j)        = 2 v cos A jImpulse = change in the momentum of ball 1 = 2 m v cos A  jSo the direction of force = direction of momentum = normal to the wall, coming out of the wall.ratio of impulses =  (2 m v cos A) / (2 m v Cos B) = cosA / cos B  = ratio of cosines of angles of incidence.
```
one year ago
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### Course Features

• 731 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions