A cyclist accelerates at 0.6 m/s2 for 20 s. a) If he was not moving at the start, what speed does he reach?
b) How far does he travel in this 20 s period?
c) He brakes and stops in 6 s. Calculate his deceleration.

a) Accelerating from rest for 20 s, the cyclist would attain a speed of

(0.6 m/s²) (20 s) = 12 m/s

b) In this time, the cylclist would cover a distance of

1/2 (0.6 m/s²) (20 s)² = 120 m

Alternatively, since we know he gets to final speed of 12 m/s and that acceleration is constant, we have

(12 m/s)² - 0² = 2 (0.6 m/s²) x

===>   x = (12 m/s)² / (2 (0.6 m/s²)) = 120 m

c) Using the definition of average acceleration, slowing from 12 m/s to a stop in 6 s involves an acceleration of

(0 - 12 m/s) / (6 s) = -2 m/s²

with the invention of the automobile, the woman of the house could drive to the store and get groceries. women were also free to socialize more. during world war ii women were allowed to work in factories to the war effort and could drive to work or ride mass transit buses to their jobs.

correct it is c.) b b