When should the equation velocity=displacement/time be used instead of using these equations like v=u+at, v^2=u^2+2as, s=ut+1/2at^2 or s=1/2(u+v)t be used.
When should we use the u,v,s,t equations be used.
When should the equation velocity=displacement/time be used??
2006-12-29 04:42:40 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
When the velocity is a constant number than you have no acceleration and the distance traveled divided by the time it took to travel will be the correct answer.
In other words; use the equation velocity=displacement/time when you have no acceleration.
2006-12-29 04:58:31 · answer #1 · answered by rikki71685 1 · 0⤊ 0⤋
Hey I see that your teacher failed to explain the basics first.
When you have the data that represents any two of the variables from velocity, displacement and time then use the simple formula.
But however if you find terms like Initial velocity, final velocity, terminal velocity, free fall etc..... then use the next set of equations(newton's).
however if you keenly observe then you will find that all the three equations of motion also represent the first equation under some or the other circumstnace.
2006-12-29 04:53:10 · answer #2 · answered by Anonymous · 0⤊ 0⤋
v=d/t is used when only distance and time are known, such as how fast was your average speed going to grandma's house
v=u+at is used when you know an initial velocity (u) and the acceleration (a) and time (t) This equation gives the velocity at any one time.
The right side is what you know and the left is what you are trying to find out. Use the equation that has your known quantities on the right and the quantity you want to know on the left.
2006-12-29 04:50:29 · answer #3 · answered by smartprimate 3 · 0⤊ 0⤋
Actually Displacement/time is an abbreviated form of three equations below, where it's only valid when acceleration = 0.
In summary, Velocity=displacement/time is effective if and only if accleration is 0.
2006-12-29 04:48:20 · answer #4 · answered by JLVA 1 · 0⤊ 0⤋
When inital velcoity which is u is zero then use v=displacement*time
if you want to know the distance travelled in a give time then use
s=ut+1/at^2
2006-12-29 04:56:55 · answer #5 · answered by Suhas 2 · 0⤊ 0⤋
When you are discussing range of a projectile or flight.
2006-12-29 04:49:11 · answer #6 · answered by Wabbit 5 · 0⤊ 0⤋