1. Vectors
Day 5
Lyzinski Physics

2. Vectors Problem Packet Homework Solutions
(24-25)

3. Fx Fy 60 lb F3 45o 33 lb 42.43 lb 42.43 lb 9.43 lb F3 x: y:
24. Fx Fy
60 lb F3
45o
33 lb
42.43 lb
42.43 lb
9.43 lb F3 x: y:
Fx =  Fx = 9.43 lb
Fy =  Fy = lb
F3 = 43.5 lb [E 77.5o S]

4. 25.
30o
4000 N T1 T2
T2sin(30)
T2cos(30)
T1sin(30)
T1cos(30)

5. 30o
4000 N T1 T2
T2sin(30)
T2cos(30)
T1sin(30)
T1cos(30)

6. Vectors Problem’s from Buffa book (pp. 96-97)

10. Day #5

11. Dv = 29.15 m/s [E 31o N] a = Dv / Dt= 1.94 m/s2 [E 31o N] 25 m/s

12. a = Dv / Dt = 55mph[] / 30ms = 55mph[] / .030sec
= 55mph[] / (8.333E-6h)
= 6,600,000 mi/h2 []
= m/s2 []

13. v1 =
10 m/s
20o
9.396 m/s
3.420 m/s
3.254 m/s
v2 =
8 m/s
24o
7.308 m/s
2.088 m/s
6.674 m/s
v2 =
8 m/s
24o
3.254 m/s
7.308 m/s
v1 =
10 m/s
20o
9.396 m/s
3.420 m/s
7 72.6o
off the wall in
the reverse
direction

15. Tonight’s HW “Day #5 Vectors HW Problems” (from the packet, #s 26-28)
Do Buffa, pg. 97, problems 40, 47, 48, 49, 53