11. A practice exercise for athletes on a track team is to sprint 100 m along a straight section of the track and then immediately turn around and jog back to their starting position. An athlete completes the sprint in 14s and then jogs back at an average speed of 2.9 m/s. (a) What is the average speed of the athlete over one full repetition of this exercise? br(b) What is the average velocity of the athlete over one full repetition of this exercise? 12. What is the velocity of the ob- ject shown in the motion diagram to the right if the total time interval recorded was 4.0 s and the vertical lines mark off 4.0 m intervals? (The final position is where the large mark is. The small dot at the other end shows where it started. The small dots show its prior posi- tions at half-second intervals.) || ||||
11. A practice exercise for athletes on a track team is to sprint 100 m along a straight section of the track and then immediately turn around and jog back to their starting position. An athlete completes the sprint in 14s and then jogs back at an average speed of 2.9 m/s. (a) What is the average speed of the athlete over one full repetition of this exercise? br(b) What is the average velocity of the athlete over one full repetition of this exercise? 12. What is the velocity of the ob- ject shown in the motion diagram to the right if the total time interval recorded was 4.0 s and the vertical lines mark off 4.0 m intervals? (The final position is where the large mark is. The small dot at the other end shows where it started. The small dots show its prior posi- tions at half-second intervals.) || ||||
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter6: Motion In Two Dimensions
Section6.3: Relative Velocity
Problem 27PP
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I need help with questions 11 and 12. For question 12 could you also tell me which direction is the object is going?
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