A brick becornes dislodged m the top or d build IQ at d heigl ur 1200 re t and f
ID: 2888942 • Letter: A
Question
A brick becornes dislodged m the top or d build IQ at d heigl ur 1200 re t and fal to th side alk bel Let the p uon rund on rar r fallinq bject be 16t2 ' nno (e) Wrte the poion, velocity, ad ecceleration functioof the brick (b) long does it take the brick to hit the sidewalk? (Round your anewer to two decimal places.) How fast is the brick taveling when it hits the sdenalk? (Ruund your aewer to deal place. velosity, and aooeleration for each given value of t. Whal can you conclue? Lt takes seconds for the car to stop, at which time it has traveled ft.Explanation / Answer
s(t)=-16t2+v0t+s0
a. s(t)=-16t2+1260
v(t)= s '(t)=-32t
a(t)=-32
b. s(t)=0
-16t2+1260=0
t=8.87s
c.v(8.87)=-32(8.87)=283.8ft/s
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