Kinematics in 2D
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B. Factors Affecting Centripetal Acceleration
1. Velocity and Acceleration?
**Direct Square Relationship
2. Acceleration and Radius?
Inverse Relationship
(One variable on top,
C. More Word Problems
ac = (6.0m/s)2/3.0 m
= 12 m/s2
Challenge
Calculate the speed an earth satellite must have to maintain a circular orbit at an altitude of 2.0 x 105 m (200,000 m) where the acceleration due to gravity is 9.2 m/s2 (radius of earth is 6,400,000 m)
Challenge
Calculate the speed an earth satellite must have to maintain a circular orbit at an altitude of 2.0 x 105 m (200,000 m) where the acceleration due to gravity is 9.2 m/s2 (radius of earth is 6,400,000 m)
[ Flash ] r = 6400,000 m + 200,000 m
= 6,600,000 m
ac = V2 /r
9.2 m/s2 =V2/(6,600,000m)
9.2 m/s2(6,600,000m) = V2
= 7,792 m/s
or 7800 m/s (Correct significant Digits)
Non-uniform Circular Motion
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ŠTony Mangiacapre.,
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