Recent content by Nimrod 7

Thanks mate :) yeah that would've been a lot easier, that's handy enough to remember Ohh now I get how you ended up with the quadratic. Once I had u, s and a, I just used v2 = u2 = 2 as and after that it was just a matter of filling in the first formula t = v - u/a (v = u + at). The quadratic...

I didn't arrive at a quadratic for this question, I simply filled that into v^2 = u^2 + 2as. I don't even know where I went wrong earlier, must've been the different fractions

But how would you use the average velocity in this question? I solved it, thanks for your help guys I just had to use the v^2 = u^2 + 2as formula to get the final velocity at D Then t = v-u/a and solve for t

In the previous part, I got v |AB| = 4 + 2.5a so I solved that and got speed at B is 17/3 m/s, that's the u for |BC| so v = u + at v = 17/3 + 2/3 (3) v = 17/3 + 2 v = 23/3 = speed at C Now the last part, the time from C to D u = 23/3 m/s a = 2/3 ms^2 s = 20m I tried to solve this...

2/3ms^2 is what I got for acceleration Can this be solved as simultaneous equations?

Homework Statement A sprinter runs a race with constant acceleration throughout. During the race he passes four posts A, B, C, D in a straight line such that |AB| = |BC| = |CD| = 20m. If the sprinter takes 5 seconds to go from A to B and 3 seconds to go from B to C, find out how long, the the...

Oh I get it now. I just did a similar question there, it's fine now :) Thanks for your help, Neill I really appreciate it

So this is what I did.. http://www.dumpyourphoto.com/files5/147040/thumbnail/bWwyF36.jpg The answers match to the answer at the back of the book and I understand most of it except... Why S1 + S2 = 162 Why do they add up to 162?

I've been usng these forumulas without a problem for a few days a = v-u/t v = u + a t s = u t + 0.5 a t^2 v^2 = u^2 + 2 a s but none of them seems adequate for this problem This is a new type of questions in my book and it has no examples of them.. I don't really understand frame of...

Homework Statement P and Q are points 162m apart. A body leaves P with initial speed 5m/s and travels towards Q with uniform acceleration 3m/s^2. At the same instant another body leaves Q and travels towards P with initial speed of 7m/s and uniform acceleration 2m/a^2. After how many...