Question

show that force of friction varies with applied force​

Answer 1

μ s a n d μ k are the coefficient of static friction and kinetic friction. If applied force(F) is less than μ N then friction force will be equal to applied force . If applied force(F) is equal to μ N then friction force is known as limiting friction force.

Answer 2

IT is true that friction changes with changing force.when we apply little force then friction becomes more but when we apply more forcd then friction becomes less for example: when we drive cycle slowly then we have to apply more force but when we drive fastly then we nee d less power to drive.