+0  
 
0
34
1
avatar

A helicopter is ascending vertically with a speed of 5.56 m/sm/s . At a height of 108 mm above the Earth, a package is dropped from the helicopter. How much time does it take for the package to reach the ground? [Hint: What is v0 for the package?]

 Jan 7, 2020
 #1
avatar+19831 
+1

v0=5.56 m/s

vf=0  (when it hits the ground)     xo = original height   xf = final height = 0

 

a= -9.81 m/s^2

 

xf = x0 + v0 t + 1/2 a t^2

o = 108 + 5.56 t + 1/2 (-9.81) t ^2

0= 108  + 5.56 t - 4.905 t^2                          solve for t = 5.29 s

 Jan 7, 2020

19 Online Users

avatar
avatar