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Unformatted text preview: city (v)
after a time interval (t) is: velocity for free fall
g= 10 m/s/s
t=times v = gt
• The distance (d) an object falls in a time interval
(t) is given by: 1
1
d = g(t ! t ) = gt 2
2
2 Problem Solving: Free Fall
• An 5 kg ball falls off of the top of Memorial Tower.
– What is its velocity after 1 s?, 3 s?
– How far has it traveled after 1 s?, 3 s? • Velocity:
– 1 s: v = (9.8 m/s/s)(1 s) = 9.8 m/s – 3 s: v = (9.8 m/s/s)(3 s) = 29.4 m/s A freefalling object has a speed of 30 m/s at one
instant. exactly 1 s later its will be"
A. the same
B. 35 m/s
C. more than 35 m/s
answer c it is be 40 m/s • Distance:
1
– 1 s: d = (9.8 m/s/s)(1 s)(1 s) = 4.9 m
2
– 3 s: d = 1 (9.8 m/s/s)(3 s)(3 s) = 44.1 m
2 Summary: 5...
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This note was uploaded on 10/15/2013 for the course PHSC 1001 taught by Professor Gregg during the Fall '06 term at LSU.
 Fall '06
 GREGG

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