what is part b, d ,and e equal to?? A silver dollar is dropped from the top of a

Question

what is part b, d ,and e equal to??

A silver dollar is dropped from the top of a briefing that is 1313 feet tall. Use the position function below for free-falling objects. S(t) = - 16t^2 + V_0t + s_0 Determine the position and velocity functions for the coin. Determine the average velocity on the interval [2, 3]. Find the instantaneous velocities when t = 2 seconds and t = 3 seconds. Find the time required for the coin to reach the ground level. (Round your answer to three decimal places.) Find the velocity of the coin at impact. (Round your answer to three decimal places.)

Explanation / Answer

a)s(t)=-16t2 +1313

v(t)=-32t

b)average velocity =[s(3)-s(2)]/(3-2)

average velocity =[(-16*32 +1313)-(-16*22 +1313)]/1

average velocity =[(-144 +1313)-(-64 +1313)]/1

average velocity =-80

average velocity =-80 ft/s

c)v(2)=-32*2=-64ft/s

v(3)=-32*3=-96ft/s

d)s(t)=0 when coin reaches ground level

-16t2 +1313=0

16t2 =1313

t =9.059 s

time required to reach the ground =9.059sec

e)vel0city of impact

=v(9.059)

=-32*9.059

=289.883 ft/s

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