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JEE Main Physics question

PhysicsLaws of MotionJEE Main

Two iron blocks of equal mass but with double area slide down an inclined plane with friction coefficient μ. If the first block with surface area A experiences a frictional force f, then the second block with surface area 2A will experience a frictional force

Answer: (B)

Solution

Kinetic friction f = μN depends only on the normal force (hence weight) and μ, not on the contact area. Since

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Question ID VK-153462