A lift is moving upwards as shown in figure in figure A block of mass m s placed ona wedge inside the left and it is statioary with to lift if f be the force of friction and N the normal reaction then chose the wrong option.

A lift is moving upwards as shown in figure in figure A block of mass

1.	A lift is moving upwards as shown in figure in figure A block of mass m s placed ona wedge inside the left and it is statioary with to lift if f be the force of friction and N the normal reaction then chose the wrong option.
Answer» ` F cos THETA =N sintheta` `f sintheta + N cos theta=mg` `f-mg siontheta =masintheta` `N-mg cos theta =ma cos theta` Answer :b