Forces+-+Pt(2)

Forces exist in a wide variety of areas, take a look at its applications. A force is a mass applied with an acceleration, there are various types of forces; friction force, tension force, elastic force, torque, gravity etc. For the sake of clarity, I will only work with friction force.

< > F-applied - F-friction
 * Friction force is a force that is in contact with the moving mass, the moving mass is opposed in the opposite direction, against the mass. There are 2 main factors that can be applied to F of friction, co-efficient of friction(how "rough" or "smooth" a surface is) & force normal( the opposite force of gravity), this gives us the formula Ff = (μ)Fn . Ex. a rock is being tugged left on the ground, the friction force will oppose this with a force lesser than the force applied it and going right.



What is the friction force of a coffee table being pushed on a carpet? The mu (μ) is 0.65 and the weight of the table is 50 kg Ff = (μ)Fn We have μ we must find fn, since Fn and Fg equals to each other we can calculate Fg also --> Fg = ma --> Fg = (50)(9.8) = 490 N

Ff = (0.65)(490) = 318.5 N