this is my psychics... i dont get it! so im kinda stuffed. please help me out
2007-07-03 18:20:46 · 13 answers · asked by rooney8 2 in Science & Mathematics ➔ Physics
lots of answers but i need 2 know which is larger in magnitude..and y
2007-07-03 18:59:34 · update #1
Velocity is the speed in a certain direction. Therefore the magnitude of the speed is just the velocity. To make it even simpler, they are the same.
2007-07-03 18:24:22 · answer #1 · answered by JeffT 3 · 0⤊ 0⤋
Speed is the magnitude of velocity. So, their magnitudes are same. Velocity has a direction in addition to magnitude and is a vector. Speed is a scalar since direction is not taken into account.
A train going around a curve is changing its velocity but not necessarily its speed.
2007-07-04 01:40:31 · answer #2 · answered by Swamy 7 · 0⤊ 0⤋
Speed is a scalar quantity (it only has dimensions of distance and time) whereas Velocity is a vector quantity (it has distance, time and direction)..
Which is larger in magnitude? The only difference between the two is that Velocity has direction..speed IS the magnitude (size) component of velocity..so speed and velocity both have magnitude. As the magnitude is a component of both speed and velocity..therefore it has to be the same in both cases.
2007-07-04 01:43:34 · answer #3 · answered by KED 4 · 1⤊ 0⤋
Velocity is a vector defined by a magnitude (which is called speed) and a direction. Thus, by its very definition, the magnitude of the fly velocity is the speed of the fly.
In the common language, velocity and speed are used interchangeably.
2007-07-04 01:38:31 · answer #4 · answered by Mozz 2 · 0⤊ 0⤋
The speed of a fly IS the magnitude of the fly's velocity. However, velocity, unlike speed, is a vector and also has a direction. If the velocity of the fly is 20 cm/sec north, the speed of the fly is the magnitude of the velocity, namely, 20 cm/sec, and the direction is north.
2007-07-04 01:38:18 · answer #5 · answered by devilsadvocate1728 6 · 0⤊ 0⤋
It depends on a few things. First off, speed is the distance traveled per unit of time, some might call that an average of the distance traveled, but that isn't always true. Velocity is the rate of change of displacement, which could be the same as speed, but it depends on direction as well. You should define a set of axis, and from that there is a possibility of either being positive or negative (and therefore bigger than one another). But you have to realize that speed is a scalar (with no direction) and velocity is a vector (with a direction). All in all, they're about the same thing, but velocity has a direction added to it.
2007-07-04 01:33:49 · answer #6 · answered by bigstealfan821 2 · 0⤊ 2⤋
Velocity has a magnitude and a direction. The magnitude is called "speed".
BTW - I hope that's "physics". Psychics perform walletectomies.
2007-07-04 01:32:22 · answer #7 · answered by virtualguy92107 7 · 1⤊ 0⤋
like others before me....
velocity = speed + direction
example
you're driving 55 miles per hour in your car heading directly south.
your velocity = 55 mph south
your speed = 55 mph
the magnitude of velocity = 55 mph
the magnitude of speed = 55 mph
the magnitude of velocity = magnitude of speed.
and no. speed is not the average speed during a trip. try that one on your friendly neighborhood police officer who caught you driving 70 in a 55. "but officer, my speed is the average of my trip. including zero miles per hour for 3 minutes at the red light and my speed whilst accelerating"
2007-07-04 02:16:47 · answer #8 · answered by Dr W 7 · 0⤊ 0⤋
Neither. The magnitude of any velocity is the speed, by definition.
2007-07-04 01:52:37 · answer #9 · answered by Anonymous · 0⤊ 0⤋
both have the same magnitude. Difference is that speed is a scalar quantity IT HAS ONLY MAGNITUDE while velocity is a vector quantity because it shows direction & ALSO HAVE MAGNITUDE
2007-07-04 01:32:43 · answer #10 · answered by ankur 2 · 1⤊ 0⤋