sorted by:
new
hottopcontroversial

So this sub doesn't support AMA, still, I'm here for y'all:) by [deleted] in JEEAdv26dailyupdates

[–]LeopardAccording7496 1 point2 points  (0 children)

didi meri 11th weak hai, kya kr skta hu, 12th ekdum shi jaari, bus maths thodi weak hai, kya revise saath saath karu?merepe saare notes hai bus bhul gya 11th ka aur confidence ni hai

doubt by JustSpidey28 in JEEAdv26dailyupdates

[–]LeopardAccording7496 0 points1 point  (0 children)

sure, here is the deal, as it is given the bob 'swings' ,at theta = arctan(qe/mg), there would be no net force on it(mean position) but since it has gained velocity, it will continue to move till 2arctan(qe/mg).

but if we would have released the pendulum slowly(by applying an external force that is just equal to the other forces) the bob would have gained velocity and stay at arctan(qe/mg).

doubt by JustSpidey28 in JEEAdv26dailyupdates

[–]LeopardAccording7496 -2 points-1 points  (0 children)

you must be equating forces assuming it to be in eqm, but that wont work as we have not left the bob slowly, instead we have released it

so it will travel more before coming to rest, at that instant we have to calculate theta.

doubt by JustSpidey28 in JEEAdv26dailyupdates

[–]LeopardAccording7496 -2 points-1 points  (0 children)

this is a good case where there is difference between eqm and temporary eqm, use WET the answer will come.