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ppk ppk
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12 years ago
The position of an air-track cart that is oscillating on a spring is given by x = (12.4 cm) cos[(6.35 s-1)t]. At what value of t after t = 0 s is the cart first located at x = 8.47 cm?
A) 4.34 s
B) 0.108 s
C) 0.129 s
D) 7.39 s
E) 7.75 s
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bio_manbio_man
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