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A stone is dropped from the upper observation deck of a tower, 400 m above the ground. (Assume g 9.8 m/s2.) (a) Find the distance (in meters) of the stone above ground level at time t (b) How long do...

A stone is dropped from the upper observation deck of a tower, 400 m above the ground. (Assume g 9.8 m/s2.) (a) Find the dist

A stone is dropped from the upper observation deck of a tower, 400 m above the ground. (Assume g 9.8 m/s2.) 

(a) Find the distance (in meters) of the stone above ground level at time t 

(b) How long does it take the stone to reach the ground? (Round your answer to two decimal places.) 

(c) With what velocity does it strike the ground? (Round your answer to one decimal place.) m/s 

(d) If the stone is thrown downward with a speed of 5 m/s, how long does it take to reach the ground? (Round your answer to two decimal places.)

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Ca) Displacemon 84 4.942. 1G)二 (Ct) 46口十digト.Qce C.Qm.Qnt_ h400- 49 (3) b) when it each the Bertand 2. 400 4.9 400 : 9.04S 9스 一88.5.92. Hence Stone, hids he gaound arl velociy 88.53am/S. Distance faom gaound 460-54 4.91+5 400 2 460 9145) 90

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