In ancient mechanics, Newton's laws of motion are the three laws that define the relationship between the movement of an object and the force it performs. The first rule is that an object can rest or continue to move at a constant speed, unless it is used for external forces. [1] The second law states that the rate of change of an object's force is directly proportional to the force used, or, of an object of constant weight, that the net force of an object is equal to the magnitude of an object multiplied by the acceleration. The third law states that if one thing has the power of the second, then the second thing has the same power and is contrary to the direction of the first thing.
Newton's first law
The first rule is that the resting object will always rest, and the moving object will always move unless it is made by an external net force. Mathematically, this equates to the fact that if the net is zero at an object, then the speed of the object remains constant.
Newton's first law is often called the inertia principle.
Newton's first (and second) rules only apply to the idle reference framework. [4]
Newton's second law
The second law states that the rate of change of body weight over time is directly proportional to the force exerted, and occurs in the same way as the force exerted.
{\ style \ mathbf {F} = {\ frac {\ mathrm {d} \ mathbf {p}} {\ mathrm {d} t}}}
where \ mathbf {p} is body pressure.
Ongoing Mass
For objects and systems with constant difficulty, [5] [6] [7] the second rule can be re-enacted with respect to the acceleration of the object.
{\ displaystyle \ mathbf {F} = {\ frac {\ mathrm {d} (m \ mathbf {v})} {\ mathrm {d} t}} = m \, {\ frac {\, \ mathrm {d } \ mathbf {v} \,} {\ mathrm {d} t}} = m \ mathbf {a},}
where F is used net energy, m body weight, and body acceleration. Therefore, the net energy used in the body produces an equal speed.
Variable-mass systems
Main article: A dynamic system
Flexible systems, such as a rocket that burns fuel and emit used gases, are not closed and cannot be treated directly by making the weight the time of the second rule; [6] [7] The balance of body mass movement m varies with time in that weight loss or gain is achieved by the second law throughout, a fixed system with a body weight and its weight removed or implanted; result [5]
\ mathbf {F} + \ mathbf {u} {\ frac {\ mathrm {d} m} {\ mathrm {d} t}} = m {\ mathrm {d} \ mathbf {v} \ over \ mathrm { d} t}
where there is a speed to remove the escape or incoming weight related to the body. From this figure one can find the equilibrium of the movement of the system of various weights, for example, the rocket Tsiolkovsky equation.
Under certain conventions, the majority of {\ displaystyle \ mathbf {u} {\ frac {\ mathrm {d} m} {\ mathrm {d} t}}} on the left-hand side, which represents intensity advertising, is defined as the force (energy applied to the body. with a variable variable, such as a rocket exhaust) and included in the plural F. Then, by inserting the mean definition, the equation becomes F = ma.
Newton's third lawThe third law states that all forces between two objects exist in equal and opposite dimensions: if one object A has the force of FA in object B, then B at the same time has the power of FB in A, and these forces are equal in magnitude and contrary to direction: FA = FB.
