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CBSE - IX - Physics - Force and Laws of Motion

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

Asked by 28th July 2012, 2:50 PM
Answered by Expert


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 Expert 28th July 2012, 3:19 PM

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