Forces+&+Newtons+Laws

1st Law - What is inertia? inertia is the tendency for objects not to accelerate. - 2 examples - when a bullet is shot there is no acceleration - when an ice skater stops skating and just slides, they slow down 2nd Law - the acceleration of an object is directly proportional to the net force acting on the object and inversly proportional to the objects mass. - What is net force, when two different forces act opon one object and it is the sum of all forces acting upon a single object. - force diagram example - difference between weight and mass - example using the moon 3rd Law - defenition of 3rd law - normal force - action reaction pairs - there are two different kinds of friction, static friction and kinetic friction. when an object is in place and there is no movement then that is static friction. static friction is the force that keeps that object from moving. kinetic friction is the force that moves the object from its original place. if a piece of cake is slid off the table then the kinetic friction would be the perso that pushed it. the coefficient of friction is the quantity that expresses the dependence of frictional forces on a particula surfaces that an object is pushed across. the two things that friction depends on is gravitry and net force.