Question

if normal force is double. what happen to fricton? why?

Answer 1

Answer:

frictional force is directly proportional to normal reaction .

so, if normal reaction double then frictional force also double . but we know frictional force is self adjusting but limiting . so, frictional force may be double or not depend on how much external force applied on it .

other wise frictional force is doubled when normal reaction is doubled.