Two blocks are connected over a massless pulley as shown in figure. The mass of block A is 10 kg and the coefficient of kinetic friction is 0.2 Block A sliders down the incline at constant speed. The mass of block B in kg is

Two blocks are connected over a massless pulley as shown in figure. Th

1.	Two blocks are connected over a massless pulley as shown in figure. The mass of block A is 10 kg and the coefficient of kinetic friction is 0.2 Block A sliders down the incline at constant speed. The mass of block B in kg is
Answer» 5.4 3.3 4.2 6.8 Solution :(b) Net pulling force on the system should be zero, as velocity is constant. HENCE, `m_(A)g sin 30^(@)=mu m_(A)g cos 30^(@)+m_(B)g` `therefore"" m_(B)=((m_(A))/(2))-((mu m_(A)sqrt(3))/(2))` `=10[(1)/(2)-0.2xx(sqrt(3))/(2)]=3.3 kg `