state the lA block of mass 2 kg is placed on a plane surface. The coefficient of static friction is .4. When a 2.8 N force is applied on the block parallel to the surface,the force of friction between the vlock and surface is
a. 2.8 N
aw of conservation of linear momentum
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Friction is a self adjusting force.
the max. value of it here is μmg = 0.4x20= 8 N
But since the applied force is less than 8N. So, the friction adjusts its value and new value becomes 2.8N so that block remains in equllibrium.
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