Ah
W1 + W2 / 2
20 + 40 / 2 = 30 rpm
So now i have average how does this make things easier?
Im from the UK by the way so i think some units / symbols are different to US if your from there.
Thanks for the help again. :)
one revolution = 2*pi radians
31.5 / 2*pi = just over 5 revolutions :)
but i had to find 2*pi first then use that answer to divided into 31.5 rads.. otherwise the answer will be completely different for some reason.
As for average angular speed:
20 / 2 = 10 rpm?
So use equation
Pheta = W1 + 0.5at^2
W1 = 2.1rad/s
W2 = 4.19 rad/s
Pheta = 2.1(10) + 0.5(0.21)(10)^2
Pheta = 21 + 10.5
Pheta = 30.5 radians?
How do i use this to find revolutions if this is correct?
Ok looking good.
Square root 8.86^2 + 22.22^2
=23.9 m/s
Ui = 23.9 m/s .. looking good its correct :)
Any reason to find the angle? I am guessing to help find other components?
If anything ever comes to using quadratic equations is there any other method that is easier such as the average...
Ok, sorry i didn't know about distance = avg speed x time formula. Wasn't told by my lecturer about that.
yes distance / speed sounds better than speed / distance lol.
so now i find Ux given by time.
Sx = Ux t
Ux = Sx / t =
Ux = 20 / 0.9 = Ux as 22.22 m/s
so if I am finding average of Ux...
Ok so in order to find t i use:
Ur saying: Distance = avg speed x time
So time = distance / avg speed?
Got 2 distances sy = 4, sx = 20m
Not sure wat to do here..
Im guessing 4 / 4.43 = 0.9s
Or 4.43/4 = 1.11s
Yes i realize using quadratics is a way to find time, i didn't know there was an easier way to solve for t thou.
as for getting the average vertical initial velocity .. i don't know what this answer goes into which equation in order to solve t.
Sorry i haven't solved for initial velocity...