Homework Assignments

Homework #1 (due Friday, 1/19 in class)

12-18 (t=21.9 s), 12-26 (v=31.4 ft/s), 12-31 (t=48.3 s), 12-47 (d=3600 ft, v=30 ft/s)

12-54, 12-62 (a₃=8 m/s², a₄=4.5 m/s²)

Homework #2 (due Friday, 1/26 in class)

Lab-1 A & B, data file

12-74 (v_x=0.398 ft/s, v_y=3.98 ft/s), 12-82 (t=3.33 sec., v=32 m/s), 

12-84 (q=6.41º when d=30 ft, q=84.9º when d=15 ft)

12-99

Homework #3 (due Thursday, 2/1 in class)

12-106 ( a=0.921 m/s²), 12-113 (v=97.2 ft/s, a=42.6 ft/s²), 12-127 (t=1.21 s)

12-158 (v=24.1 ft/s, a=8.17 ft/s²), 12-165 (v=0.242 m/s, a=0.169 m/s², v_x=-0.162 m/s, v_y=0.18 m/s),

12-168 (v=0.237 m/s, a=0.278 m/s²)

Homework #4 (due Thursday, 2/8 in class)

12-185 (V_B=V_C=2 m/s), 12-187 (v_B=8 m/s, a_B=6.8 ft/s²), 12-200 (V=21.67 ft/s, t=36.91 s)

13-14 (a) a_A=P/m-3mg,  (b) a_A=P/(2m)-2mg, 13-26 (a_A=1.29 ft/s², s=9.7 ft)

13-43 P=2mg[(sinq+mcosq)/(cosq-msinq)]

Homework #5 (due Thursday, 2/15 in class)

13-59 (N=1.57 kN), 13-70 (s=0.581 m), 13-73 (T=0, T=104N)

13-95 (P=2.75 lb, N=3.08 lb), 13-99 (F=5.07 kN, N=2.74 kN), 13-101 (dq/dt=4 rad/s, T=8 N)

Lab-2

(2) V(x=10 m)=9.02(m/s)

(3) Discuss: should V=9.02 (m/s)?  Justify it!

Homework #6 (due Thursday, 2/22 in class)

14-3 (v=13 m/s), 14-15 (v=7.18 ft/s), 14-24 (F=43.9 N)

14-38 (v=5.8 ft/s), 14-49 (P=0.644 hp), 14-54 (P=1.12 kW)

Lab-3

3(b)

Stage 1: 0<t<11.76(sec.)    

Stage 2: 11.76 (sec.)<t<29.4(sec.)    a(t)=0.25t-1.96

Stage 3: t>29.4 (sec.)    

Homework #7 (due Friday, 3/2 in lab class)

14-72 (F=227 N), 14-77 (v=12.6 ft/s, N=18.9 lbf), 14-86 (v_B=114 ft/s, N_B=29.1 lbf)

14-96 (x=0.24 m), 15-18 (F=3.64 kip), 15-23 (magnitude: 8.49 N.s; direction 17.3º)

Lab-4

Homework #8 (due Friday, 3/16 in Lab class)

15-41 ( v_B=3.48 ft/s; N=504 lb; t=0.216 s), 15-42 (v_B2=3.29 ft/s), 15-54 v_A=3.29 m/s, v_B=2.19 m/s)

15-56 (V_A=-4.53 m/s, V_B=-1.73 m/s), 15-60 (F=45.2 lb), 15-67 (h=21.8 mm)

Homework #9 (due Friday, 3/23 in Lab class)

15-69, 15-78, 15-81

15-86, 15-102, 15-106

Homework #10 (due Friday, 3/30 in Lab class)

16-58, 16-63, 16-74

16-91, 16-117, 16-126

Lab-5

Homework #11 (due Friday, 4/6)

16-141, 16-143, 17-35, 

17-50, 17-57, 17-61

Homework #12 (due Friday, 4/13)

17-75, 79, 98, 103, 111, 112

Homework #13 (due Friday, 4/20)

18-11, 14, 23, 30, 47, 53