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#29 Re: Help Me ! » why do people keep throwing the ball up? » 2014-06-01 19:15:46

gAr

Yes!
And I thought the initial velocity given was redundant there.
I think the equation was given to obtain the value of 'a', to indirectly say that the ball is thrown on earth-like planet!

#30 Re: Help Me ! » why do people keep throwing the ball up? » 2014-06-01 17:08:36

gAr

Since velocity is (displacement) / (time taken), we need to use differentiation, not integration.

Suppose we don't know differentiation too, then we need to obtain the answer by putting in actual numerics.

Then we can make out that the answer approaches 8.4 m/s.

#44 Re: Help Me ! » Integral, mass and polar coordinates » 2014-05-30 03:02:35

gAr

Hi,

I remembered it wrong, I looked up the cylindrical coordinates again.
You missed the limits slightly.
I think I got the answer now:

#45 Re: Help Me ! » Integral, mass and polar coordinates » 2014-05-30 01:27:33

gAr

Getting the bounds in 3D is tricky for me as well, can't imagine the shape precisely!

I am thinking transformation may not be necessary because if we write the integral:

the square root will be eliminated on integrating w.r.t z.

#46 Re: Help Me ! » Integral, mass and polar coordinates » 2014-05-30 00:44:45

gAr

Okay, then I think the source of the question itself is missing some information.
I think it's doable without any transformation.

#47 Re: Exercises » Probability-1 » 2014-05-30 00:17:26

gAr

Hi,

May be bad for now, we all keep learning!

#49 Re: Exercises » Probability-1 » 2014-05-29 23:42:07

gAr

Next problem:


10 numbers (x_i) are chosen from U(0,1). What is the probability that


?

#50 Re: Help Me ! » Integral, mass and polar coordinates » 2014-05-29 23:36:00

gAr

I assumed various bounds, but got neither of the answers.

And in 3 dimensions, you need to consider cylindrical or spherical coordinates for transformation. I did not understand what you did there.

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