Doubt from kinematics

elastic-collision
kinematics
moderate
unsolved
pp
#1

Questions 12

2 Likes
#4

@Raghudevram_Singh
Bro, what was your approach to solve?

#5

I get that involving maths using trajectory of projectile,but completely nonunderstanding

#6

@Raghudevram_Singh
Wait did you get the final answer matching?

#7

What is happening here, can't understand the question

#8

Mee ,too , please try 11,for questions 11 l done by mathematics by doing inclined plane as a tangent to trajectory of projectile,any other method???

#9

@Raghudevram_Singh
@pratyaksh_tyagi
You are throwing the ball from one edge A, it collides with the inner surface of the hemisphere, and comes back to A.

This is for question 12.

#10

I just tried to find out point of intersection of parabolic path with semicircular curve but it transferred in to cubic. Whose one root is zero clearly but unable to do further

#11

@Raghudevram_Singh
I didnt get the answer but I think this is what happens. The ball collides at that spot where its velocity is in radial direction. Why? cuz then the velocity will be reflected as it is and the path will be retraced.

I think this is best method bro.

#12

But how to proceed further,l done this before

#13

Getting stuck again with four variables ϴ, \beta, u and t. and 4 equations.

#14

@pratyaksh_tyagi
Bro, can you try this?

#15

No,l doing maths

#16

Anyone try this , I am not getting . Tanmay Sir

#17

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#21

Pls see the solution...the question is true copy of the question in Krotov problems books on physics...most of the IIT coachings materials tken from russian books

#22

Tanmay Sir I am asking about Q 12