MSN.com-Hotmail, Outlook.. . Bowie State University P. xKe a.com/ibiscms/mod/ibi

Question

MSN.com-Hotmail, Outlook.. . Bowie State University P. xKe a.com/ibiscms/mod/ibis ng Movies 49 Gradebook 2/26/2018 06:00 PM O 30.1/100 Print @Calatator -f Penodic Table Question 25 of 26 Sapling Learning You attach a meter stick to an oak tree, such that the top of the meter sick is 1.27 meters above the ground. Later, an acom fals from somewhere higher up in the tree. If the acom takes o 226 seconds to pass the length of the meter stick, how high above the ground was the acorm before it fel (assurming that the acorm didn't run into any branches or leaves on the way down) Number

Explanation / Answer

given

s = 1 m

t = 0.226 sec

using equation

s = ut + 1/2 a t2

1 = u X 0.226 + 0.5 X 9.8 X 0.2262

1 - 0.25 = u X 0.226

u = 0.75 / 0.226

u = 3.318 m/s

and uisng v2 - u2 = 2 g h

h = v2 - u2 / 2 g

h = 3.3182 - 02 / 2 X 9.8

h = 0.561 m

then height of the acorn above the ground is

h = 0.561 + 1.27

h = 1.831 m

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