Chapter 7 Flashcards
Newton’s First Law:
An object will remain at rest or continue to with a constant velocity unless acted upon by a resultant force.
State Newton’s Second Law:
The resultant force on an object is directly proportional to the rate of change of momentum and in the same direction.
F∝ (Change in P)
————————————
(Change in t)
Change in P = Force × Change in time
Newton’s Third Law:
Every action has an equal and opposite reaction.
What is the equation for the change in momentum (P)?
Change in momentum = mv - mu
Change in P = (mass × final velocity) - (mass × initial velocity)
If momentum is constant:
Change in P = m(v - u)
What are the FOUR fundemental forces?
Gravitational Force.
Electromagnetic Force.
Stong Nuclear Force.
Weak Nuclear Force.
What is the equation for MOMENTUM (P)
Momentum = Mass × Velocity
P = mv
kgms = kg × ms
What is THE LAW OF CONSERVATION OF MOMENTUM?
In a closed system (where no external forces are acting) the total momentum of all objects, in a specified direction, remains constant.
State the table of INELASTIC and ELASTIC COLLISIONS.
In all collisions and interactions, what is conserved in all directions?
Linear momentum
Momentum P1 + Momentum P2 = Overall Momentum (P)
What is IMPULSE?
Change in momentum.
How do you calculate MOMENTUM on a GRAPH?
Calculate the area underneath the graph.
How do you solve COLLISIONS IN TWO DIMENSIONS?
Using Vector Trianges
