in my wuestion befor how ist coming as 4 n isnt it f=ma giving -4*1= -4n

Asked by  | 28th Jul, 2012, 02:50: PM

Expert Answer:

you asked for force of friction.
The name itself suggest an opposing force so it really doesnt matter if we dont put any negative mark in the answer.
but that negative mark is to be put in the calculations

Answered by  | 28th Jul, 2012, 03:19: PM

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