Recent content by HelpMeWIN123

ahhh thank you sOOOO MUCH!

well i was tryign to make sense of it in the fact that V= dy/dt Vdt = dy, and dy = yf-yi or change in y then ∫V dt = yf - yi is where i get stuck because how you can just integrate one side and how do you have the wherewithall to do this.

the kinematics equation i used upstairs; yf = yi +viy *t +1/2 ay t^2 also how does ∫(dy/dt)dt = yf - yi could i just shortcut and say ∫(dy/dt)dt = yf? I think I'm utterly lost here...isn't dy/dt already vf-vi when change in time approaches 0

Yeah you're right, I guess here I just didn't understand how to differentiate (figuratively) the different of when I have constant a or constant v versus not, the thing is once I have the velocity that I got from integrating my acceleration, why can't i just plug that into my kinematics...

so i just integrated that further and got the answer., integrated the velocity rather.

AHHH you're right, and a genius, and a scholar. Acceleration is not constant, so we can't use those formulas for constant acceleration. whenever they give you an a with respect to time, this is a variability acceleration, so in order to achieve V we must integrate a. Thanks. But now if I'm...

can you be more specific, integrate what, and integrate why?

anyone? please? pretty please?

Simple velocity vector problem; IS MY SOLUTION MANUAL WRONG OR AM I?! Homework Statement A particle starts from the origin with velocity 5i at t=0, and moves in the xy plane with a varying acceleration given by a= 6 Sqrt(t) j, where t is in s. a.) Determine the vector velocity of the...

Homework Statement A fish swimming in a horizontal plane has a velocity Vi=(4i +1j) m/s at a point in the ocean where the position relative to a certain rock is ri = (10i -4j)m. After the fish swims with constant acceleration for 20.0s, its velocity is v=(20i -5j) m/s. a.) What are the...

Dude, listen I did all that. they are incredibly easy to break down into components BECAUSE THEY ARE COMPONENT VECTORS, it's -3000j and -3000i the third vector can be broken down using sin and cosine. MY FIRST POST talked about doing it graphically and that the problem is i didn't know if I...

bummp, anyone?

Alright; I'd much prefer algebraically. Can you outline how I find the direction of the resultant vector of three vectors?

Point is, now if i use the tail-tip method, I have a polygon

whaaaaaat, that was last week man. These are three main vectors I computed. I already found the magnitude. I just can't find the direction now of these three. The components of the 1800 NW vector you mean? Tail to tip method says -nothing- about components., you have to use your main...