AQA GCSE - Unit 3 (P3,B3,C3) New specification papers.

Anyone up for questions at around 4pm or later?

Can anyone explain how the hydraulics work for P3..?
Thanks..

Ok, the formula for pressure is p= F/A (i'm sure you know what these represent)

The first piston has a small cross sectional area and a force is applied. The liquid (keeping in mind that pressure in a liquid is always EQUALLY TRANSMITTED IN ALL DIRECTIONS) will push against the second piston, which has a larger surface area. We know that P=F/A and so Pressure times area must equal force. With a larger area in the 2nd you would get a larger force than that of the first piston!

Get it? Or did I confuse you

That was perfectly fine! thank you soo much ! - it was better than my revision guide! x

CGP book any good for P3?

I dont understand what the whole hydraulics thing is

Can someone explain please?

P3 is so boring , and takes a fair time to get your head around

You doing ray diagrams?

yeah done that like 2 hours ago, its okay but boring , i understand most of the things in 3a but its just confusing and boring ... *sigh* its a hard life...

How much did you do today?

I've done like 4 hours of physics - finished all of 3a from the cgp book ,

anyone up for revision game ?

Explain the electric motor. how does it work..?
(I need some help on this as well aha)