how do you find the Tension force,acceleration,magnitude. Its those questions where you have pullys,boxes pushing each other... I am really confused for the 3rd law
Do you have a specific example? I'd hate to just vapidly repeat the definition of the 3rd law, which you can easily find anywhere and everywhere....
Two masses are places in a frictionless pulley system.Solve for the acceleration and tension forces. 1st box is 4kg and the other is 3kg well i know, fnet=ma fg=mg ff=muFn
You could start by saying that there is a net, unbalanced force of 10N (For GCSE level thought - or you can do 9.81m/s/s, if you like), pulling one up and one down. This is accelerating both the masses (7kg total), use your formula to find the acceleration. The tension will be ml times (g + this acceleration) for the light mass and also mh times (g- this acceleration) for the heavy mass. Those two values should be the same, natch - as a check. etc etc - you can put in the numbers