A force of 750 N is applied to a block of 100 kg to prevent it from sliding down an inclined plane of 30^(@) inclination. If coefficients of static and kinetic friction are 0.4 and 0.2, the frictional force acting is :

A force of 750 N is applied to a block of 100 kg to prevent it from sl

1.	A force of 750 N is applied to a block of 100 kg to prevent it from sliding down an inclined plane of 30^(@) inclination. If coefficients of static and kinetic friction are 0.4 and 0.2, the frictional force acting is :
Answer» 750 N 500 N 350 N 250 N Solution :Here `F = mu mg COS THETA` `= 0.4 XX 100 xx 10 xx(sqrt2)/(2)` `= 200 xx 1.732 = 3.464 xx 10^(2)` `= 350 N ("nearly") ` (c) is the CHOICE.

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A force of 750 N is applied to a block of 100 kg to prevent it from sliding down an inclined plane of 30^(@) inclination. If coefficients of static and kinetic friction are 0.4 and 0.2, the frictional force acting is :

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