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## Yahoo! Group Title A mass m is released from height h on a block of mass m which rests on a smooth floor after elastic collision with the surface the mass will rise to a height ? one year ago one year ago

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1. sauravshakya Group Title

No sure but the answer should be either h or 0.

2. Yahoo! Group Title

|dw:1353298638078:dw|

3. sauravshakya Group Title

So, the ball was not dropped vertically

4. Yahoo! Group Title

Nope...and sorry i Forgot to Draw the Pic !

5. sauravshakya Group Title

|dw:1353299020369:dw| The motion of the ball would be somewhat like that. Do u mean to calculate that h' interms of h.

6. Yahoo! Group Title

Yup...

7. Yahoo! Group Title

But The answer shuld be 2h/3 ....No prob...Show the Way u Did This..)

8. Yahoo! Group Title

Velocity at Bottom is sqrt 2gh

9. gerryliyana Group Title

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10. Yahoo! Group Title

So..According to u h =h1

11. gerryliyana Group Title

i mean vg' is not equal to 0...,

12. Yahoo! Group Title

@Vincent-Lyon.Fr

13. Vincent-Lyon.Fr Group Title

Is the ball rolling on the wedge? Even if it has pure translational KE, max height will be less than h because on top of the parabola, KE is not zero, due to horizontal component of motion.

14. Yahoo! Group Title

Ball is on Translation..)

15. Yahoo! Group Title

Not need to Consider Moment of Inertia

16. Yahoo! Group Title

@Vincent-Lyon.Fr @experimentX @siddhantsharan @ghazi @ajprincess @CliffSedge @akash123 @Aperogalics

17. Shadowys Group Title

Since it is taken as a particle, I will assume that after collision with the floor, it will jump at an angle of 45 degrees. To the maximum height on the other side, H, Using this, $$v^2_y-u^2_y = 2aH$$, where $$v^2_y=0, u^2_y =2gh \sin 45, a =g$$ Now sub it all in and we get, $$H=\frac{h}{2}$$ Did I miss something?

18. Yahoo! Group Title

The answer shuld be 2h/3

19. Yahoo! Group Title

@CliffSedge @CliffSedge @CliffSedge @CliffSedge

20. Shadowys Group Title

If there is no friction...then I suppose the height should be halved...

21. Yahoo! Group Title

@Vaidehi09

22. Vaidehi09 Group Title

i also got the ans as h/2. wonder where i'm going wrong....is the ans really 2h/3 ?

23. siddhantsharan Group Title

It's H/2. Recheck your solutions.