|Jun23-12, 09:04 AM||#1|
Concept Of Linear Momentum and definition of Force
I understood that Newton has introduced a concept called "Force" which is basically a cause for an effect i.e. if an object is in a state of rest and if applied a "force" then the object moves (change in velocity, ∴ accelerates) also if an object moves with a constant velocity and is disturbed then an acceleration is produced for the same reason as above. Thus a force is a cause and a change in velocity is an effect. This, based upon my understanding, is deduced from the law of inertia (given by Galileo and simply restated by Newton)!
What I don't follow is that:-
1) JUST WHAT IS THE CONCEPT OF LINEAR MOMENTUM?!!!!!!!
2) Why is momentum expressed as mass TIMES velocity?
3) How did Newton obtain the second law from the momentum concept?
Please can anyone give examples and explain the momentum concept?
physics news on PhysOrg.com
>> Promising doped zirconia
>> New X-ray method shows how frog embryos could help thwart disease
>> Bringing life into focus
|Jun24-12, 02:27 AM||#2|
Momentum is a property of motion that is conserved during interactions of free bodies. This fact allows us to calculate velocity vectors after colliding bodies separate, based on their masses and velocity vectors prior to collision^. During most such collisions kinetic energy is not conserved; so it's handy that momentun is.
|Jun25-12, 09:15 PM||#3|
|Similar Threads for: Concept Of Linear Momentum and definition of Force|
|Impulse of a force - effect on linear and angular momentum||Classical Physics||3|
|Dynamics: Impulse and Linear momentum (impulsive force exerted on catchers glove)||Engineering, Comp Sci, & Technology Homework||8|
|princip. of linear impulse and momentum , diff. btw. impulsive force and non-impulsiv||Classical Physics||5|
|Maximum Force - Linear momentum||Introductory Physics Homework||1|
|Aircraft Carrier - Linear Momentum converted to Angular Momentum and Impact Force||Engineering, Comp Sci, & Technology Homework||0|