07 - Laws of Motion and Momentum Flashcards
Newton’s first law of motion
a body will remain at rest or continue to move with constant velocity unless acted upon by a resultant force
Newton’s second law of motion
rate of change of momentum of an object is directly proportional to the resultant force and takes place in the direction of the force
Newton’s third law of motion
when two objects interact, each exerts an equal but opposite force on the other during the interaction
linear momentum
product of mass and velocity of a particle, measured in kgms^-1 or Ns
closed system
an isolated system that has no interaction with its surroundings
principle of conservation of momentum
total momentum of a system remains the same before and after a collision
perfectly elastic collision
a collision in which no kinetic energy is transferred
inelastic collision
collision in which kinetic energy is transferred to other forms