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I will help u with it.F=mv-mu/tGot it ! Thanks
Can you help for Q9 ? :/
http://olevel.sourceforge.net/papers/9702/9702_s13_qp_12.pdf
so =>m/t can be formed using=(speed*density*area)----------------------------ms-1*kgm^-3*m^2===kgs-1
then----->mv-mu/t
so the value u obtain from multiplying all just now multiply it with the value ofvelocity--------kgs-1*(30-0)
I dont really know the right way but this way is ok as i coud do based on their units