Calculate time an object takes to fall to the ground
Description
HP15C Owner's Handbook  Pages 014016
The time an object takes to fall to the ground (ignoring air friction) is given by the formula
t = SQRT(2h/g)
where
t = time in seconds,
h = height in meters,
g = the acceleration due to gravity,
9.8 m/s²
Example:
Compute the time taken by a stone falling from the top of the Eiffel Tower (300.51 meters high) to the earth.
Manual solution:
3 0 0 . 5 1 ENTER
2 x
9 . 8 ÷
√x
Programmed Solution:
3 0 0 . 5 1
f A
Program Resources
Labels
Program
Line 
Display 
Key Sequence 

000 



001 
42,21,11 
f LBL A 

002 
2 
2 

003 
20 
× 

004 
9 
9 

005 
48 
. 

006 
8 
8 

007 
10 
÷ 

008 
11 
√x̅ 

009 
43 32 
g RTN 
