dynamics Flashcards
newton’s first law of motion
an object at rest will remain at rest and an object in motion will remain in motion at constant velocity in the absence of an external resultant force
inertia
reluctance of a body to change its state of rest or uniform motion in a straight line
mass
measure of a body’s resistance to change in velocity
weight
force acting on a mass due to a gravitational field
newton’s third law of motion
if body A exerts a force on body B, then body B exerts a force of the same type that is equal in magnitude and opposite in direction on body A
linear momentum
product of its mass and velocity and is in the same direction as its velocity
newton’s second law of motion
the rate of change of momentum of a body is directly proportional to the resultant force and occurs in the direction of the resultant force
impulse
product of an average force acting on an object and the time for which the force acts
principle of conservation of linear momentum
total momentum of a system remains constant provided no external resultant force acts on the system
elastic collision
total kinetic energy in conserved
inelastic collision
total kinetic energy is not conserved
perfectly inelastic collision
colliding bodies will coalesce with one another and move off with the same velocity
