2006-10-17 23:37:15 · 14 answers · asked by at 2 in Science & Mathematics ➔ Physics
velocity=speed + direction. Thus ur statement is correct only for linear motion
2006-10-17 23:54:24 · answer #1 · answered by Anonymous · 0⤊ 1⤋
You need to get your concept cleared.
Only CHANGES are uniform.
Things like velocity and acceleration are not uniform, they are constant.
We say uniform motion, but we do not say constant motion.
Similarly, we say constant velocity/acceleration, not uniform acceleration.
And here is the answer to your question.
If a car is traveling with constant speed, let's say in a circular path, it does not have a constant velocity because the direction of the car is constantly changing.
2006-10-18 06:57:16 · answer #2 · answered by jimmy_siddhartha 4 · 0⤊ 0⤋
Speed is completely independent of direction, while velocity is not. For example, if the car was travelling in a circle at a constant speed, it's velocity would be constanly changing, because the direction is constantly changing.
2006-10-18 08:26:31 · answer #3 · answered by physicsgeek330 2 · 0⤊ 0⤋
Uniform speed does not imply uniform velocity .velocity is a vector quantity so it depends not only the magnitude(here speed) but also the direction of motion. so if the car is moving with same speed but its direction changes then velocity will change.
2006-10-18 07:53:55 · answer #4 · answered by Aneesh J 1 · 0⤊ 0⤋
magnitude of istantaneous velocity is instantaneous speed.... but not the other way round...
the answers is no, if a car is travelling with uniform speed, its velocity may or may not be uniform...... because the path might not be exactly a straight line( as velocity is dependent on direction as well.... so change in direction sugests change in velocity)..........therefore ravelling with uniform speed does not imply travelling with uniform velocity....
2006-10-18 06:52:06 · answer #5 · answered by the_rip_roaring 3 · 0⤊ 0⤋
No, this is a no- brainer.
velocity is a scalar quantity while speed is a magnitude.
scalar quantities involve magnitude and direction. a car may be travelling at constant speed but it maybe is constantly changing direction.
therefore, the velocity is constantly changing.
2006-10-18 08:23:52 · answer #6 · answered by superlaminal 2 · 0⤊ 0⤋
Not necessarily. Speed is independent of direction, whereas velocity is not.
If you drive in a circle at a constant 30mph, your speed is constant, but your velocity is not, because you're continually changing direction.
2006-10-18 06:49:40 · answer #7 · answered by Morgy 4 · 1⤊ 0⤋
superlaminal tried to explain, but made it all wrong...
speed is scalar and has only magnitude (no direction)
velocity is vector which has magnitude & direction.
Speed = Total distance travelled/time ie, S=D/t (scalar irrespective of direction)
velocity (v) = Rate of change of displacement = dx/dt
Bit more explanation (I love physics!)
acceleration = rate of change of velocity = dv/dt
As per Newton's second law of motion:
Force = rate of change of momentum = dp/dt = d(mv)/dt (where as 'p' is momentum = mass*velocity)
Hence, force = m.(dv/dt) = m.a
2006-10-18 11:26:52 · answer #8 · answered by Jasee J 2 · 0⤊ 0⤋
speed is depends on its distance while velocity is depends on its displacement (somethg to do with direction?), so it would be same unless ithe car changes it direction.
2006-10-18 06:48:40 · answer #9 · answered by odell 2 · 0⤊ 0⤋
yes unless it turn around and starts going the other way.
Speed is total distance travelled OVER time
Velocity is only DISPLACEMENT over TIME.
2006-10-18 06:38:44 · answer #10 · answered by Anonymous · 0⤊ 0⤋