Please solve q 13?

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1 Answer
Dec 31, 2017

The tension in the string is =11.1N

Explanation:

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