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Question: a cannon fires a shell straight upward 18s after it...

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A cannon fires a shell straight upward 1.8s after it is launched the shell is moving upward with a speed of 20 m/s assuming air resistance is negligible find the speed of the shell at launch and 4.9 s after launch
10. 6 27 WA 032 A cannon fires a shell straight upward; 1.8 s after it is launched, the shell is moving upward with a speed of 20 m/s. Assuming air resistance is negligible, find the speed (magnitude of velocity) of the shell at launch and 4.9 s after the launch. (a) at launch (b) 4.9 s after the launch m/s 蝋Reading
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