problem04_53

# University Physics with Modern Physics with Mastering Physics (11th Edition)

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4.53: Differentiating twice, the acceleration of the helicopter as a function of time is , ˆ ) s / m 12 . 0 ( ˆ ) s / m 120 . 0 ( 2 3 k i a - = t and at 5 0s t = . , the acceleration is . ˆ ) s / m 12 . 0 ( ˆ ) s / m 60 . 0 ( 2 2 k i a - = The force is then [ ] k i a a ˆ ) s / m 12 .
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Unformatted text preview: ) s / m 60 . ( ) s / m 80 . 9 ( N) 10 75 . 2 ( 2 2 2 5-× = = = g w m F . ˆ ) N 10 4 . 3 ( ˆ N) 10 7 . 1 ( 3 4 k i ×-× =...
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