With an average acceleration of -1.2m/s(squared), how long will it take a...

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missvictoria

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...cyclist to bring a bicycle with? an initial speed of 6.5m/s to a complete stop? I'm new with physics does anyone know how I can set up this equation?
 
5.417 seconds.

6.5 / 1.2 = 5.417

The bicycle will lose 1.2 m/s of it's velocity every second.

The entire process will take 5.417 seconds.
 
5.417 seconds.

6.5 / 1.2 = 5.417

The bicycle will lose 1.2 m/s of it's velocity every second.

The entire process will take 5.417 seconds.
 
acceleration = change in speed / time
acceleration = (final speed - initial speed) / time

a = (vf - vi)/t

to solve for time, multiply both sides by t and divide by a:

t = (vf - vi)/a

now substitute values:

t = (0 - 6.5)/(-1.2)
t = 6.5/1.2

=> t = 5.4 s <=
 
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