2006-10-03 14:39:06 · 6 answers · asked by jack_sparrow1986 1 in Science & Mathematics ➔ Physics
b/c it is the time and space, not velocity and acceleration that are the independent variables
you need them ( time and space) to describe everything else
2006-10-03 15:01:39 · answer #1 · answered by oracle 5 · 1⤊ 0⤋
Velocity and acceleration are functions of time. The units for velocity = length per unit time (L/t). For acceleration = velocity per unit time (V/t) = length per unit time squared (L/t^2).
If you find an equation for distance (L) with nothing but t in each term, that's because each term has had its length factors set to some constant. For example L = 1/2 a t^2 is a special case for the distance something will travel in time t at acceleration a.
Frequently this is written L = k t^2, where k = 1/2 a and is given as some number, like L = 4.9 t^2, which looks like L is just a function of t, but it isn't. How do we know this? Check out the units. L has to be in length units like meters or feet. But t^2 is in sec^2; so the k has to be in length per sec^2 (acceleration) to end up with length as the unit for L.
2006-10-03 14:59:32 · answer #2 · answered by oldprof 7 · 0⤊ 0⤋
its good if v keep the hings basic , time is basic vleocity n avveleration not. Its is easier to derive relation of velocity n accleratio n from a s-t graph rahter going backbackwards though not difficult.
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2006-10-03 14:58:40 · answer #3 · answered by james 1 · 0⤊ 0⤋
the equations of motion r basic ones.it is xpressed as a function of time and not velocity, as velocity and acceleration are not basic.
they r functions of time
2006-10-04 05:50:50 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Simply because time is an accepted constant for Newtonian physics. One second is always exactly one second long. Time makes for a handy frame of reference.
Velocity and acceleration can vary infinitely. Both include time as a component, by the way.
2006-10-03 14:50:12 · answer #5 · answered by Professor 3 · 2⤊ 2⤋
hey you dont like them express as functions of time thats cool
express them anyway you want
whatever makes you happy
2006-10-03 14:43:21 · answer #6 · answered by Anonymous · 0⤊ 4⤋