mathslover 2 years ago Projectile Motion - question.

1. mathslover

2. DLS

IITJEE !

3. mathslover

YES!

4. JFraser

Are you assuming that the projectile is fired at such an angle that would be the same as the position of the plank before it started moving? This isn't particularly complicated to solve, just will require a few pieces

5. DLS

This is way too lengthy but interesting,just proceed step by step.

6. JFraser

start with the collision. We know that the impact must occur when the stone is moving at 45-degrees, so the x- and y-components of its vector velocity must be equal. The impact must also occur at a height of 3.0m from the ground, since the plank moves purely horizontally

7. DLS

@mathslover Here you go!! http://www.youtube.com/watch?v=HNeQDSASrcs Just stuck me :P

8. mathslover

@DLS :P @JFraser can u explain with some eqns ? or with some steps...?

9. DLS

@mathslover that video will explain this question?u didnt get it?

10. mathslover

I am going through it DLS.

11. DLS

that will explain it clearly =)

12. mathslover

Thank you DLS, thanks jfrazer also.

13. JFraser

you'll end up with a system of equations to solve simultaneously, but I don't have it done yet

14. mathslover

Okey!