Physics 271: Advanced Honors Physics I

Recitations

Fall 2017

2. 10.6 m. If you got twice this number, reread carefully what the problem asks you to find. If you found the time first, then the distance, it is correct but not efficient. Look at the constant-acceleration relations to find one that gets you directly there (without having to do an extra unnecessary computation).

3. 1.62 x 10

4. (a) 3.60 m/s

(b) 8.40 m/s

5. 41.6 s In this situation, the elevator reaches its maximum speed and travels at that speed for a while before it has to decelerate in order to arrive at the destination at rest.

7. (a) 5.4 s (b) 41 m/s

8. 12.3 m/s. First find the time for the first stone to fall.

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