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Acceleration

Change in velocity vs. time used.

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Acceleration is the ratio change in velocity to time used and can be expressed as

a = dv / dt

= (v 1 - v 0 ) / (t 1 - t 0 )      (1)

where

a = acceleration (m/s 2 , ft/s 2 )

dv = change in velocity (m/s, ft/s)

v 1 = final speed (m/s, ft/s)

v 0 = initial speed (m/s, ft/s)

dt = time taken (s)

t 1 = final time (s)

t 0 = initial time (s)

Example - Motorcycle Acceleration

motorcycle acceleration

If a motorcycle accelerates from 0 km/h to 100 km/h in 3 seconds , the acceleration can be calculated as

a = ((100 km/h) - (0 km/h)) (1000 m/km) / (3600 s/h)) / (3 s)

= 9.26 (m/s 2 )

or close to acceleration of gravity 1 g = 9.81 (m/s 2 ) .

The time from 0 - 100 km/h for an acceleration equal to gravity can be calculated by modifying the equation above to

(9.81 m/s 2 ) = ((100 km/h) - (0 km/h)) (1000 m/km) / (3600 s/h)) / dt

or

dt = ((100 km/h) - (0 km/h)) (1000 m/km) / (3600 s/h)) / (9.81 m/s 2 )

= 2.83 s

Acceleration Calculator

The calculator below can be used to calculate acceleration:

Acceleration vs. change in time and velocity

Download and print Acceleration vs. Change in Velocity and Time chart

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Related Topics

  • Dynamics

    Motion - velocity and acceleration, forces and torque.

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