Free-Fall Acceleration
المؤلف:
Professor John W. Norbury
المصدر:
ELEMENTARY MECHANICS & THERMODYNAMICS
الجزء والصفحة:
p 24
7-12-2016
2757
Free-Fall Acceleration
If we neglect air resistance, then all falling objects have same acceleration
a = -g = -9.8 m/sec2 (g = 9.8 m/sec2).
Example I drop a ball from a height H, with what speed does it hit the ground ? Check that the units are correct.
Solution
Check units: The units of g are m sec-2 and H is in m. Thus 
has units of 
. which is the correct unit for speed.
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