Please solve q 13?

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Answer 1 · 2017-12-31T18:59:53

The tension in the string is #=11.1N#

Let the tension above #C# be #=(T)N#

Let the acceleration of the system be #=(a)ms^-2#

Therefore,

#5g-T=5a#........... #(1)#

#T-4g=4a#.................#(2)#

Adding equations #(1)# and #(2)#

#9a=g#

#a=1/9g#

Let the tension in the string connecting #A# and #B# be #=T_1#

#T_1-mg=ma#

#T_1-g=1*1/9g#

The acceleration due to gravity is #g=10ms^-1#

#T_1=10/9g=100/9=11.1N#