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Average Velocity and Average Speed

  • The average velocity gives the information about how fast an moving object changing its position with time.

  • Average velocity is defined as the change in position or displacement (Δx) dividing by time interval (Δt), in which displacement occurs.

v¯=x2x1t2t1=ΔxΔt

  • Where, x1 and x2 are the positions of the object at time t1 and t2, respectively; and the average velocity is represented by the v¯ ( v bar).

  • The SI unit… (122 more words) …

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Instantaneous Velocity and Speed

  • As we know, the average velocity gives the information about how fast an object changing position with time interval. But for next instant of time information of object is not given by average velocity.

  • Therefore to know this, instantaneous velocity or simply velocity v at an instant time t is defined as the limit of the average velocity as the time interval Δt becomes infinitesimally small.

v=limΔt0ΔxΔt

v=dxdt(Eq.a)

  • Where limΔt0… (40 more words) …

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