Defintions 2 Flashcards
Newton’s first law
An object continous in a state of rest or uniform velocity unless it is acted upon by a net or resultant force.
Inertia
The property of an object that causes it to resist a change in its state of rest or uniform motion.
Newton’s second law
When a net force, Fnet, is applied to an object of mass, m, it accelerates in the direction of the net force. The acceleration, a, is directly proportional to the net force and inversely proportional to the mass.
Newton’s third law
When object A exerts a force on object B, object B simultaneously exerts an oppositely directed force of equal magnitude on object A.
Newton’s law of universal gravitation
Every particle with mass in the universe attracts every other particle with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres.
Linear momentum
The product of the mass and velocity of the object.
Newton’s second law in terms of momentum
The net force acting on an object is equal to the rate of change of momentum.
Impulse
The product of the net force and the contact time.
Law of conservation of linear momentum
The total linear momentum of an isolated system remains constant.
Elastic collision
A collision in which both momentum and kinetic energy are conserved.
Inelastic collision
A collision in which only momentum is conserved.
Work done on an object by a force
The product of the displacement and the component of the force parallel to the displacement.
