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20 May, 23:14

Compare the acceleration of a motorcycle that accelerates from 80 km/h to 90 km/h

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  1. 20 May, 23:36
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    Speed is a magnitude, a scalar quantity (i. e. 65 mph)

    Velocity is a magnitude and direction, a vector quantity (i. e. 65 mph north)

    Acceleration is the change in velocity over a unit of time

    (1) Different rates of acceleration.

    Given for the motorcycle:

    Vi = 80 km/h

    Vf = 90 km/h

    Given for the bicycle

    Vi = 0.0 km/h

    Vf = 10 km/h

    *IF * the time unit is the same (let's say 10 seconds), the actual value is the SAME for each, because the change in velocity was the same for each. 10 km/h over 10 seconds.

    a = [ Vf - Vi ] / t

    a = [ (90 km/h) - (80 km/h) ] / (360 h)

    a = [ 10 km/h ] / (360 h)

    a = 0.023 km/h^2

    See, same thing, bicycle or motorcycle, change is 10 km/h, over the same time period gives the same value.

    Incidentally, you should usually use meters per second (m/s) and seconds (s) not hours and kilometers.
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