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The figure (A) and (B) shows two differe...

The figure (A) and (B) shows two different arrangements of a spool being pulled with a constant force F in each case. Identify the direction of motion of centre of mass, and the direction of friction force in each case

(i) The centre of mass moves along _______ x-axis in figure (A). (negative/positive)
(ii) The frictional force acts along ___________ x-axis in figure (A). (negative/positive)
(iii) The centre of mass moves along ____________ x-axis in figure (B). (negative/positive)
(iv) The frictional force acts along _____________ x-axis in figure (B). (negative/positive)

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