Question

What is the difference between speed and velocity?

Answer 1

speed
spēd/Submit
noun
1.
the rate at which someone or something is able to move or operate.
"we turned onto the runway and began to gather speed"
synonyms: rate, pace, tempo, momentum
"the speed of their progress"
2.
rapidity of movement or action.
"the accident was due to excessive speed"
synonyms: rapidity, swiftness, speediness, quickness, dispatch, promptness, immediacy, briskness, sharpness; More
the rate at which something happens or is done.
"they were bemused by the speed of events"
3.
each of the possible gear ratios of a bicycle or motor vehicle.
4.
the light-gathering power or f-number of a camera lens.
the duration of a photographic exposure.
the sensitivity of photographic film to light.
5.
informal
an amphetamine drug, especially methamphetamine.
6.
informal
something that matches one's tastes or inclinations.
"oak tables and chairs are more his speed"
7.
archaic
success; prosperity.
"wish me good speed"
verb
verb: speed; 3rd person present: speeds; past tense: sped; past participle: sped; gerund or present participle: speeding
1.
move quickly.
"I got into the car and home we sped"
synonyms: hurry, rush, dash, run, race, sprint, bolt, dart, gallop, career, charge, shoot, hurtle, careen, hare, fly, zoom, scurry, scuttle, scamper, hasten; More
(of a motorist) travel at a speed that is greater than the legal limit.
past tense: speeded; past participle: speeded
"the car that crashed was speeding"
synonyms: drive too fast, exceed the speed limit
"he was caught speeding"
move or work more quickly.
"you force yourself to speed up because you don't want to keep others waiting"
cause to move, act, or happen more quickly.
"recent initiatives have sought to speed up decision-making"
synonyms: hasten, expedite, speed up, accelerate, advance, further, promote, boost, stimulate, aid, assist, facilitate
"a warmer climate will speed his recovery"
2.
archaic
make prosperous or successful.
"may God speed you"

ve·loc·i·ty
vəˈläsədē/
noun
the speed of something in a given direction.
"the velocities of the emitted particles"
(in general use) speed.
"the tank shot backward at an incredible velocity"
synonyms: speed, pace, rate, tempo, momentum, impetus; More
ECONOMICS
the rate at which money changes hands within an economy.
noun: velocity of circulation; plural noun: velocities of circulation

I googled it. Just sourcing it :)

Answer 2

The short answer is that velocity is the speed with a direction, while speed does not have a direction.

Speed is a scalar quantity -- it is the magnitude of the velocity. Speed is measured in units of distance divided by time, e.g. miles per hour, feet per second, meters per second, etc....

Velocity is a vector quantity -- when giving the velocity we must specify the magnitude (the speed) and the direction of travel. For example you might drive 100km/hr (the speed) in a northerly direction.

This is analogous to the difference between distance (a scalar quantity) and displacement (the distance with direction.)

Answer 3

velocity has a magnitude and direction.
speed is simply a magnitude

Velocity tells you the displacement/time
speed tells you the distance/time

Answer 4

displacement is with respect to a position
where as speed is with respect to the movement itself

Answer 5

I didn't know it myself, tnx dan

Answer 6

yeah Vector and Scalar quantities is very good to note

Answer 7

Hi Sarandip. Have you understood what the difference is or do you require more?