Recent content by Matt.D

Hi all! How do you calculate the coefficient of friction for a tyre sample going against concrete? My experiment involves a uniform piece of concrete angled at 30 degrees with a pulley attached at the raised end. The tyre sample is placed at the end of the concrete slab and is loaded...

...Would really appreciate it :)

I've got my final Electronics paper to hand in on Thursday and would be grateful is someone could give my answers the once over :) Question 1. The circuit (the attached picture) is connected up with switch S closed. The variable resistor, R is adjusted so that the micro-ammeter reads...

Thanks Gokul! I've really got to start reading questions more thoroughly.. I'm losing marks like this all of the time :rolleyes:

Thanks Doc! Using the rearranged formula I've calculated: R = pl/S R = 0.0007 x 2.0 / 0.0004 R = 0.0014 / 0.0004 R = 3.5 Ohms Using Ohms Law I = V/R I = 1.5V (as stated in the question) / 3.5 ohms I = 0.42857.. I = 0.43

Is the correct equation that relates to the electrical resistivity of a conducting material to its resistance: p = RS/l p = is the electrical resistivity R = is the resistance of the material S = is the cross-sectional area l = is the length of the specimen if I'm using the right...

I've been given a Physics Assignment for my half term holiday, but I'm a little stuck with the following question. The topic is Electricity. Question 2. a) Draw the I - V characteristics for two components, A and B, both of which obey Ohm's Law. Component B has a lower resistance than...

Hi Daniel, sorry, I got it wrong again! Thanks for all your help though.. I'm going to ask my tutor for more help in this area. Again, many thanks Regards Matt

so u divide both sides by t to end up with u = s - 1/2 a ________ t

s = ut + 1/2 at2 /2] s = u + 1/2 at t*s = u + 1/2 a t = s / u+ 1/2 a u = t / 1/2 a * s

ahh, ok, if I add the signs does that make it correct (sorry, I don't understand u=u(t,a,h)

Thanks Daniel, Hallsofivy! Regarding the question rearranging the formula s = ut 1/2 at2 would this be the correct method: s = ut 1/2 at2 /t] s = u 1/2 at t = s / u 1/2a u = t / 1/2a * s

Hey guys, I've been given a maths assignment that's due tomorrow and I'd just like to verify the answers before submitting. I've put the question in bold and have just put the answer where I feel confident. The rest I have shown my workings. Q.1 The length, d m(meters), of a retangular...

Hi Dexter, Thanks for your help. Is the next part; T = mg cos 37 T = 0.5*9.8 cos 37 T = 4.9 0.798 T = 6.14N Matt

Hi Daniel, I don't think that its a vector triangle (we haven't covered that so I'm 99% sure that it isn't) so the 1.25m for the length is the same for the hypothenuse because its the same length - only its displaced to the side. right? So if the hyp is 1.25 then to find the inside angle I...