16 Replies
iTeachChem Helper
@Gyro Gearloose
iTeachChem Helper
Note for OP
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hardcoreisdead
hardcoreisdeadOP2mo ago
Where am I wrong
No description
Say_miracle_shadow
ig u have not taken a3 for those m3 and m4 in constraint relation eqn where u have just written a1=2a2, acc to me it should be a3+2a2+a1=0 (i took all acc in downward dirn.)
SirLancelotDuLac
3 and 4 would not have an acceleration w.r.t each other, so consider the pulley-m3-m4 to be a system of mass 2 kg. Now, a1+a_system+2a2=0, sue to symmetry between 1 and system, a1=a(system).
hardcoreisdead
hardcoreisdeadOP2mo ago
isnt a3=a4 so after applying virtual work method they just get cancelled ohh , will try again like this
SirLancelotDuLac
They won't as they dont have any acceleration w.r.t each other. In the ground frame tho, both have same accelerations in the same direction
hardcoreisdead
hardcoreisdeadOP2mo ago
hmm makes sense also for m3 and m4 we use reduced mass formula toh get M=2 right ?
SirLancelotDuLac
Not reduced mass formula, rather you consider the system as one rigid body with net mass being mass of pulley+mass of m3+mass of m4=2
hardcoreisdead
hardcoreisdeadOP2mo ago
when do we reduced mass formula then ...
SirLancelotDuLac
You use reduced mass system when mass sort of acts in "parallel" sort of condition. For instance, a binary star system or spring joining 2 masses.
Say_miracle_shadow
how to approach for it's (A) part? how did you approach for (A) @hardcoreisdead
iTeachChem
iTeachChem2w ago
we good?
hardcoreisdead
hardcoreisdeadOP2w ago
+solved @SirLancelotDuLac
iTeachChem Helper
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