sup people! Curiosity Question :3
In a projectile motion, the laws says that the Force at a point(location of projectile) is determined by acceleration of that point at that instant and "not by any history of the motion of the particle"
But this is just so not digesting ;_;
It is obvious that the projectile's motion IS DEPENDED on the force with which it is thrown(or whatever). The more force we apply to throw it, the more far it goes. IT DOES HAVE TO DO SOMETHING WITH THE HISTORY OF THE PARTICLE.
>Comment on this view. And lay down your views about this and just try to make me understand the logic<
Spammers, go get a life :)
Help me with this! =]
Answers
See !, projectile motion is composed of two 1-D motions, a horizontal motion which is an uniform motion (having constant velocity, thereby having no acceleration) and a vertical motion which is an uniformly accelerated motion (having constant acceleration downwards, i.e. g). The moment you throw a projectile, you just provide it a force in some direction. One thing to note is that the force provided by one is only for a very short period of time, so you just provided it an initial velocity as you threw it. When it follows a parabolic path, it just feels a force in the downward direction which is the gravitational force.
I've answered your question as much as I've understood it. I'm also confused a bit. But I hope, it'll help you.
Hey Sammie, here's your answer!
It is true that the more force you apply at the beginning, the farther the particle will travel.
Consider this tho. Projectile motion is a 2D motion. It is resolved into two 1D motions, namely the horizontal and vertical component. The horizontal component (v cos §) always remains constant unless there is air resistance or something.
The vertical component (v sin §) changes due to gravity. This component is the only one where acceleration is in effect.
Also, throughout the motion, the only force acting on the particle is gravity. So the only force acting is mg downwards while the particle is in motion. The initial force or history of motion does not change mg.
This is why the force on the particle depends only on its current acceleration and not on its history of motion.