rotation

9 Answers

1
fibonacci ·

i have 3 unknowns(a, T1,T2) and 2 equations. how can i get the thir equation b/w a and T2

11
virang1 Jhaveri ·

Simplest method
Find the mass of the pulley(m) then
mg=(1+m)a
a = mg/1+m

1
fibonacci ·

virang how can we find the mass.
the ans given is 10 m\s but your ans will be <9.8 as m/(m+1) < 1

11
virang1 Jhaveri ·

I = MR2/2
0.2= M*400*10-4
M= 5kg

5/6*10
0.833*10
=8.3m/s

1
fibonacci ·

can we assume the pulley as a disc? it isnt written anywhere

still the answer given is 10m/s

21
eragon24 _Retired ·

find the rel betwee accle of pulley and the block

if accel of block is a accel of pulley will be a/2

T1= 1.(a)........................................

(T2-T1)R=Iα........................

a/2=Rα......................................

I=m2 R2/2

m2 be mass of pulley

so

m2g- T1-T2=m2 (a/2)

1
fibonacci ·

eragon ans using your method isnt matching :(

21
eragon24 _Retired ·

array jus check it once more it will match......dese r the only eq to be formed

1
fibonacci ·

got it eragon :) thanks did'nt know you were Deepak

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