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so sleep alone tonight
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This blog was opened by (SOPHIAARON) to accomodate (SOPHIA)'s Science journal.Do enjoy your stay here, and don't take what's not yours! tagboard
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Physic - 9
Sir Isacc Newton's 3 laws of motion:First law There exists a set of inertial reference frames relative to which all particles with no net force acting on them will move without change in their velocity. This law is often simplified as "A body persists its state of rest or of uniform motion unless acted upon by an external unbalanced force." Newton's first law is often referred to as the law of inertia. Second law Observed from an inertial reference frame, the net force on a particle of constant mass is proportional to the time rate of change of its linear momentum: F = d(mv)/dt. This law is often stated as, "Force equals mass times acceleration (F = ma)": the net force on an object is equal to the mass of the object multiplied by its acceleration. Third law Whenever a particle A exerts a force on another particle B, B simultaneously exerts a force on A with the same magnitude in the opposite direction. The strong form of the law further postulates that these two forces act along the same line. This law is often simplified into the sentence, "To every action there is an equal and opposite reaction." Taken from: http://en.wikipedia.org/wiki/Newton's_laws_of_motion Looking at the first law of Newton, I don't really get what he really meant. I think that the first law is trying to get to us that unless a force is acted to a stationery object, it would not move. I don't really know. I think I will blog about it when i understand its meaning behind it. Second law is as confusing. I think it is trying to say that the speed of the object swing is dependant on the mass of the object, is that right? I doubt so): similarly, i will blog as soon as possible when i got the answer. Third law: It's trying to tell us that the force will be passed on the the next object when the force is tranferred to it by the initial object. The last sentence of the law has explained everything we need to know(: hooray! I'll get better explanation next time, hopefully tomorrow or the day after tomorrow. I promise(: I will post the explanations? (: |