Recent content by blaze33

i won't check it with a calculator, but i see u got the point. :)

if u differentiate the velocity vector u get the acceleration vector. if u integrate the velocity vector u get the position vector. u know how integration works right?

u get position vector by integrating the velocity vector.

u don't need to use F in this problem at all. its all about momentum. yes u can solve for the velocity of the second car using conservation of momentum: Pi = Pf m1v1 + m2v2 = m1fv1f + m2fv2f since they come to rest after collision the final momentum is 0. so m1v1 = -m2v2 i think u can...

lol i was stuck in the same question as well but its kinda easy and don't break ur head with this stuff.. just remember the equation u won't have time to think about it on the exam

lol jegues thanks. hope the exam will be simpler than that haha

yes but it also has time, which is uknown.

Homework Statement a wheel rotates with a constant angular acceleration pie rad/s^2. during a certain time interval its angular displacement is pie rad. at the end of the interval its angular velocity is 2pie rad/s. what is the angular velocity at the beginning of the interval? Homework...

yea i got it thanks! i looked at the question and did it all over again and i certainly missed that i should have done 4(3x - 1)(3x -1) instead of 4(3x +1)(3x +1) and for the final expression i got: 4(3x-1)(3x-1)/(3x-1)(3x-1)(3x+1) which gives 2 after substituting.

yea man thanks!

yea i got 4(9x^2 - 6x + 1) the first time as well but didnt know what to do with it further.. I am bad at factoring i heard about l'hopital's rule but never learned how to use it.. my prof. didnt teach us because he said sometimes it doesn't give the right answer so why bother

yea your right... I am not too good at algebra anyway so it takes time till i realize things like that

simplifying the numerator gives 36x^2-24x+4 factor it to (12x+4)(3x+1) factor it again to 4(3x+1)(3x+1) so 4(3x+1)(3x+1)/(3x-1)(9x^2-1) can i cancel (3x+1) and (3x-1) ? well i tried canceling it anyway and then substituted 1/3 again now i get 8/0 so its +infinity i guess.

Homework Statement limit as x->1/3 of (2-6x)^2/(3x-1)(9x^2-1) Homework Equations The Attempt at a Solution substituting gets 0/0, tried expanding but it doesn't work either, don't know what else is there left to do...