How far will a car travel in 15 min at 20 m/s ?
Generally it is a Yes. Instantaneous velocity is the exact velocity at a particular time in the course of the movement. However, average velocity is the average of all the instantaneous velocity over a period of time. It is also known as speed in everyday life. As a result, the movement of an object over a time period under varying velocity denotes a varying instantaneous velocity which could be different from the average velocity. It is however, possible that the instantaneous velocity equates to the average velocity at a certain point over the duration of movement. For example, a ball is traveling at instantaneous velocity of 99m/s at t=1s , 100m/s at t=2s and 101m/s at t=3s. the average velocity over the 3s period is hence 100m/s which coincides with the instantaneous speed at t=2s.
instantaneous velocity
if you accelerate from a stand-still at 2m/s/s for four meters and end at 8m/s your average velocity is 5m/s. but at one meter the instantaneous velocity is 2m/s, at two meters it is 4m/s, three is 6m/s and four meters is 8m/s. 0meters 1meter 2meters 3meters 4meters |---------------|---------------|---------------|---------------| 0m/s 2m/s 4m/s 6m/s 8m/s
st/t4 = s/t3 or st-3
If a 5 mile stretch of a bus journey lasts 15 minutes, then the average speed over this stretch was 20mph. But undoubtedly the bus achieved greater speeds than this, and it also spent time sitting still in queues. So the simple answer to the question is 'yes'. Less trivially and more interestingly: unless velocity is actually constant, then an object's average velocity over a finite time interval - and hence any empirical measurement of its speed - must (nearly always) differ from the instantaneous velocity. As the time period grow closer to zero, the measured velocity will converge on the instantaneous figure, but will never reach it.
T4's "full name" is "Enterobacteria phage T4"!
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Richard Alan Bates has written: 'An instantaneous velocity recorder' -- subject(s): Equipment and supplies, Speed-indicators, Sprinting, Design and construction
Richard B. Miles has written: 'Instantaneous velocity fields and background suppression by filtered Rayleigh scattering' -- subject(s): Rayleigh scattering 'Velocity profiles in a hot jet by simplified relief ; The application of the relief technique for velocity field measurements in the ASTF-C1 test cell' -- subject(s): Chemical kinetics
Acceleration at the point of zero vertical velocity will be equivalent to gravitational acceleration on that body. On Earth, for example, this is around 9.8 meters per second per second (9.8m/s2).
Velocity is the time derivative of position, instantaneous velocity is the limit as the change in time goes to zero of the change in x divided by the change in time:lim delta t-->0 delta(x)_________delta(t)---------------------------------Velocity is the first derivative of position (I'll denote X) with respect to time, t. It is usually written V = dX/dt, or f'(t), whichever notation is more convenient. For example, if an object's position in free-fall (in meters) is given by X = -4.9t2 + 10t + 200, then dX/dt = -9.8t + 10 (applying the power rule), and dX/dt evaluated at, say, t = 4 s, is equal to -9.8(4) + 10 = -29.2 m/s (hence, 29.2 m/s downward).
Final velocity is the your last velocity traveled. Example if you travel 50m/s your final velocity is 50m/s because its the last velocity traveled, 0m/s is the initial velocity. Its not your total velocity because if u start running at 5m/s then accelerated 25m/s, your final velocity is NOT 30m/s. It is 25m/s. Also, your velocity change is 20m/s(25-5).