A minimum force F is applied to a block of mass 102 kg to prevent it from sliding on a plane with an inclination angle 30^(@) with the horizontal. If the coefficients ofstatic and kinetic friction between the block and the plane are 0.4 and 0.3 respectively, then the force F is

A minimum force F is applied to a block of mass 102 kg to prevent it f

1.	A minimum force F is applied to a block of mass 102 kg to prevent it from sliding on a plane with an inclination angle 30^(@) with the horizontal. If the coefficients ofstatic and kinetic friction between the block and the plane are 0.4 and 0.3 respectively, then the force F is
Answer» 157 N 224 N 315 N zero Solution :(a) `MG SIN theta=(102)(10) sin 30^(@)=510N` `mu , mg COS theta =(0.4)(102)(10) cos 30^(@)` =353 N `F=510-353=157N`