Peoples Physics Book Version-3

http://www.ck12.org Chapter 26. Answers to Selected Problems

3. 14 s for round trip


4. Let’s say we can jump 20 feet( 6 .1 m)in the air.,Then, on the moon, we can jump 36.5 m straight up.
   11.−31m/s^2


5. 23 m/s


6. 3.6 seconds


7. 28 m


8. 45m


9. 25 m/s


10. 30 m


11. 2.5 m/s^2


12. 2 m/s^2
    1.v 0 = 0


13. 10 m/s^2
    3.−10 m/s^2


14. 60 m


15. 0.3 m/s^2


16. 0.5 m/s

Ch 4: Two-Dimensional and Projectile Motion

1..
2..
3..
4..
5..
6..

1. 13 m


2. 41 degrees
   3.vy=26 m/s;vx=45 m/s


3. 56 degrees, 14 m/s
   7..


4. 32 m
   
   
   1. 0.5 s
   
   
   2. 0.8 m/s
   
   
   
   


5. 104 m
   10.t= 0 .60 s, 1 .8 m below target


6. 28 m.


7. 3.5 s.


8. 35 m; 15 m


9. 40 m; 8.5 m


10. 1.3 seconds, 7.1 meters


11. 50 m;v 0 y=30 m/s; 50^0 ; on the way up


12. 4.4 s


13. 19◦


14. 0.5 s