SolutionsSet02

# SolutionsSet02 - Homework Solutions Set 02 Problem 1...

This preview shows pages 1–4. Sign up to view the full content.

Homework Solutions Physics 121 Set 02 Spring 2008 - 1 - Problem 1 In order to study the motion of the black, we divide the 16-second period into 6 smaller periods, during which the force is constant. The relevant information is summarized in the following table. t start (s) t stop (s) F (N) a (m/s 2 ) v start (m/s) V stop (m/s) x start (m) x stop (m) 0 2 2 0.5 0 1 0 1 2 6 8 2 1 9 1 21 6 8 4 1 9 11 21 41 8 12 0 11 11 41 85 12 14 8 2 11 15 85 111 14 16 6 1.5 15 18 111 144 The following relations were used to related to final velocity and position in each period to the initial velocity and position in that period: v stop = v start + a t stop ! t start ( ) x stop = x start + v start t stop ! t start ( ) + 1 2 a t stop ! t start ( ) 2

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Homework Solutions Physics 121 Set 02 Spring 2008 - 2 - The average velocity during the 16-second time period is equal to the ratio of the change in position and the change in time: 144/16 = 9 m/s. The average acceleration during this period is equal to the ratio of the change in velocity and the change in time: 18/16 = 1.125 m/s 2 . Using the same technique, we can also calculate the distance the block traveled in the first 10.9 s. We find that the distance is 72.9 m.
Homework Solutions Physics 121 Set 02 Spring 2008 - 3 - Problem 2 The rocket in this problem is exposed to two forces: The gravitational force

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 7

SolutionsSet02 - Homework Solutions Set 02 Problem 1...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online