Newton's Laws And Momentum Flashcards
Newton’s first law of motion
A force is necessary to change to state of rest or of uniform motion in a straight line of a body
State Newton’s second law of motion
The rate of change of the momentum of an object is directly proportional to the net force acting upon it
Linear momentum
The mass of an object multiplied by it’s velocity
Vector
p=mv
Ft=mv-mu
Define the Newton
One Newton is the force that gives a mass of one kilogram an acceleration of metre per second each second
Newton’s third law
When body A exerts a force on body B, then body B exerts an a force that is equal, opposite in direction and of the same type
The principle of the conservation of momentum
In any direction, in the absence of external forces, the total momentum of a system remains constant
Impulse
Change in momentum of a body. F x change in t
Equal to the area beneath a force-time graph
What is a perfectly elastic collision?
A collision in which no momentum or kinetic energy is lost
What is an inelastic collision?
A collision in which momentum is conserved, but kinetic energy is not
What is the formula for momentum, when combined with Newton’s Second Law?
F = (mv - mu) / t
What is F x t?
Impulse
What is force is equal to if F = (mv - mu) / t?
Impulse per second
If we plot a graph of Force (y) against time (x), what will the area under the graph equal?
The impulse
Define velocity
The rate of change of displacement of an object
Define a closed system
A system of interacting objects where there are no external forces
