While waiting for your plane to take off, you suspend your keys from a thread and set
Chapter 13, Problem 83(choose chapter or problem)
While waiting for your plane to take off, you suspend your keys from a thread and set the resulting pendulum oscillating. It completes exactly 90 cycles in 1 minute. You repeat the experiment as the plane accelerates down the runway, and now measure exactly 91 cycles in 1 minute. Find the planes acceleration.
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