velocity may be expressed in which way?
153008
Also, when speaking about velocity, you need to know the direction in which something is travelling.
216275
I believe momentum equals Velocity times Mass.  So momentum is displayed in kgm/s
876839
speed is velocity - both measured as the change of distance divided by the change in time. You may mean the angular velocity, how fast is it spinning; or how fast the air is moving around the center (relative to the air not spinning); or how fast the tornado is moving across the ground.
727932
Having a negative velocity just means that it is moving in the negative direction so it is still moving.\n\nTo solve this you need the following equation that you have probably seen before:\n\nat + vinital = Vfinal\n\na = -0.23 m/s^2\nt = 2.2 s\nvinitial = -1.5 m/s\n\nUsing this you can find vfinal.\n\nIf you are doing non-calculus base physics then the average velocity is just vfinal-vinitial/t.
475201
velocity is just a term that means "speed" - the distance traveled per time unit \n\nthe "speed of light" is a number - the actual speed (velocity) that light travels, usually reported in meters/second (distance/time)
853525
Both the above answers are correct, provided the acceleration is horizontal. If it's not then it's a vectors and trig. question.
797399
velocity=107,300 km/h (or if you prefer 67,062 miles per hour)
448264
Given v_i = initial velocity = 0; v_f = final velocity = 44 m/s; a = 9.8 m/s^2:\n\ndv/dt = a = 9.8 m/s^2\ndv = 9.8 dt\nint(dv, v_0, v_f) = int(9.8 dt, 0, t)\nv_f - v_0 = 9.8t\n44 - 0 = 9.8t\nt = 44/9.8 = 440/98 = 220/49\n\nint(dv, v_0, v) = int(9.8dt, 0, t)\nds/dt = v = 9.8t\nds = 9.8tdt\nint(ds, 0, h) = int(9.8tdt, 0, 220/49)\nh = 4.9(220/49)^2/2 = (49*22*220)/(49*49*2) = (11*220)/49 = (2200 + 220)/49 = 2420/49 ~ 49.3878\n\nAlternatively, since accelration was constant, you could always get it more quickly with the formulas that were derived with integrals as above:\n\nv_f = v_0 + at\ns = v_0t + 1/2at^2\n\nEither way you should get 2420/49 m if the initial conditions are correct.  I don't know where 122/5 comes from although it seems to be approximately a half of this answer.
109422
This is pretty close to an question that was asked previously.\n\nI presume you mean Velocity= Distance/time, and you want the derivatives with respect to time t (for velocity in a 1-dimensional space; velocity strictly speaking is a vector and needs magnitude and direction). \n\nThe first derivative of velocity with respect to time is called acceleration. The second derivative of velocity with respect to time is called the boost or jerk. \n\nYou have not stated if distance D is a function of time or not. Assume that D is a constant. \n\nThen dV/dt=-D/t^2 is the acceleration\n\nAnd d/dt(dV/dt)=2D/t^3 is the boost.
679906
or is it maximun voltage?\n\nlike terminal velocity is maximum speed...
399954
SPEED=dy/dt=distance/time.its not exactly something you invent.it was an axiom,a basis of understanding.
86843
Corresponding to the definition:\n\nav=deltaX/deltaT\n\nWhere av is average velocity.\n\nSo because of deltaX being zero, av is Definitely zero
1106173
The direction (angle) of |u| and |v|?
498603
Eggman is good except for one point: velocity is a vector not a scalar.  He was right that velocity was a speed and direction.  He just used the wrong term.\n\nAnother example would be that of a pendulum.  When the pendulum bob is at the peaks on either side, it is experiencing acceleration, but it has zero velocity for the instant it is at either peak.\n\nThis is actually the same as throwing a ball up in the air, and the ball stops for an instant at the very top of its path.  The only difference is the pendulum keeps going.  The point is, the peaks of a pendulum, and the peak of a ball being thrown straight up into the air are really the same thing happening.
184202
Yes - velocity is what is called a "Vector" - vectors have two parts, the size, and the direction.\n\nIf I travel at 60 mph north, and then travel at 60 mph west - the two vecrods are different because the directions are different.\n\nThe speed part of each of the vectors is the same (60 mph), since speed doesn't have a direction, only a size.\n\nSpeed answers one question - "how fast?"\n\nVelocity answers two questions - "how fast" and "in what direction?"
103569
Displacement.  If you mean its change in position *divided* by the time it took, that would be its average velocity.
24383
here are some simple mechanics formulas dealing with velocity:\n\nv=d/t\na=v/t\nvf^2=vi^2+2ad\nd=vit + 1/2at^2\n\nwhere v is velocity, vi is initial velocity, vf is final velocity, a is acceleration, and t is time.  also the i and the f after the v are just subscripts, and ^2 just means sqared.