friction is an important force to have in life because friction helps objects that move or roll stop. Like brakes on a car, when you push down on the brakes the friction is there when the wheels stop,and the car will stop to.
Friction between things is important because it provides the necessary force to maintain and produce actions and work. It is essentially needed to walk and write.
Yes they are equal because they are both forces and when the thrust of planes (for example) are high in the air, the thrust pulls the plane forward. While the friction force pushes the plane forward. Think of it as someone pushing you towards something that you don't want to go into, that is the same as thrust and friction forces because the thrust is pushing you forward and the friction force is the balance of it all.
You would need friction between the tires or tracks and the dirt the tractor is sitting. If you have extended legs, you need friction between the pads and the ground. You would want friction in the brakes. A clutch also relies on friction. Technically you could "dig water", but if you are trenching, then one needs friction between the dirt particles. It is also handy to have friction in your seat, steps, and controls.
the washer should be used where the exact matching between nut and bolt is required and also the chances of vibration is frequently occurring the washer is mainly used to make a good contact between the surfaces. the friction force occurring between the washer and the plate is so large because of u0 (co efficient of friction) . that it absorbs the vibration.
The coefficient of kinetic friction between wool felt and aluminum is about 0.24 to 0.26.
You need to know both material involved in the friction to find the coefficient
An important formula is that friction = (coefficient of friction) x (normal force).
The force of friction, which is the normal force (weight) multiplied by the coefficient of friction (how rough the carpet is).
Statical friction
friction is a natural force
The strength of the force of friction depends on the types of surfaces involved and on how hard the surfaces push together.
and because we would float off into space
to prolong live and it will take less force to get it moving
to prolong live and it will take less force to get it moving
which following is an exmpale of the force of friction
No. Friction can only slow an object down. If friction were imparting a force greater than that of the applied forces, then friction in and of itself would actually be causing the object to move, which does not happen.
The normal force between the two objects and the coefficient of friction. Force of friction = normal force x coefficient of friction.
Since friction means a contact force, the nature of contact will influence friction force. Smoothness of objects affect the friction force. However, as contact pressure rises, the friction does not rise.