this question i dont know how to solve it .. can any one please help me out ?
http://i35.tinypic.com/wvrfv7.jpg(thats the image if the above one is too small)
the question says " calculate the minimum force needed just to lift the spherical ball above the floor , the weight of the spherical ball is 50N
i did everything else on the drawing u can get the idea and the values required .
answer is F=26
the teacher said something about using equilibrium's second law .
sum of moment acting on the body= 0
clockwise moment = anti clockwise
can any one explain this question please ?
