(6%) Problem 12: Referring to the figure, a truck travels a distance

d=22.6m

in the positive\

x

direction in a time\

t_(1)=19.2s

, at which point the truck brakes, coming to rest in\

t_(2)=6.43s

.\ 25% Part (a) What was the truck's average velocity in the horizontal direction, in meters per second, during the

t_(1)

time period?\

v_(avg )=1.180(m)/(s)

\

Correct!\

25%

Part (b) Assuming the truck started from rest and moved with a constant acceleration, what was the acceleration, in meters per squared second, during time interval

t_(1)

?\

a=0.1230(m)/(s^(2))

\

Correct:\

v_(1)=2.350(m)/(s)

\

Correct!\

25%

Part (d) Using the result from Part (c), what was the truck's horizontal component of acceleration, in meters per squared second, during the braking period?\

a_(b)=,(m)/(s^(2))

\ Grade Summary\ Deductions

(6\%) Problem 12: Referring to the figure, a truck travels a distance d=22.6m in the positive x direction in a time t1=19.2s, at which point the truck brakes, coming to rest in t2=6.43s. 25% Part (a) What was the truck's average velocity in the horizontal direction, in meters per second, during the t1 time period? vavg=1.180m/s Correct! 25% Part (b) Assuming the truck started from rest and moved with a constant acceleration, what was the acceleration, in meters per squared second, during time interval t1 ? a=0.1230m/s2 Correct: 25% Part (c) What was the truck's instantaneous velocity in the horizontal direction, in meters per second, when it began braking? 1=2.350m/s Correct! 25% Part (d) Using the result from Part (c), what was the truck's horizontal component of acceleration, in meters per squared second, during the braking period? ab=m/s2 Grade Summary Deductions