Kinetics Flashcards
kinetics
study of the forces that inhibit, cause, facilitate, or modify the motion of a body
law of inertia
every body continues in its state of rest, or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon
static equilibrium
sum of all external forces acting on an object is zero
newton’s second law
change of motion of an object is proportional to the force impressed; and is made in the direction of the straight line in which the force is impressed
acceleration of a system is inversely proportional to the mass of the system to which the force is applied
newton’s third law
forces exist in pairs
one force is met with an equal and opposite reaction force
equal and opposite forces can produce unequal reactions due to variations in mass
law of universal gravitation
all factors are constant except for the mass of the object interacting with the earth
the gravitational force of the earth causes the object to accelerate towards it
momentum
a system’S quantity of motion
the greater the quantity of motion possessed by a system the more difficult it is to stop the motion
if there is no change of motion without an external force what happens to momentum
nothing
momentum and newton’s first law
absence of a net externally applied force, the total momentum of a system that comprises multiple bodies remains constant in time
elastic collisions
when the object collides and bounces off each other
inelastic collision
when the objects collide and stick together
result of a collision depends on
degree to which the objects stick together during a collision
the elasticity of the object
coefficient of restitution
quantifies how elastic collisions between objects are
linear impulse
the product of applied force and the interval of force application
