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โจทย์ ปรนัย
-.50 -.25 +.25 เต็ม 0 -35% +30% +35%
W1 = 6*2 W2 = 1/2*6*3 W1 = 12 W2 = 9 W1+W2 = 12+9 = 21
W1 = F*D W2 = 1/2*F*D
T1 = (m1=m2)a+(m1+m2)g T2 = (m2)a+(m2)g T1 = (3+2)(2)+(3+2)(10) T2 = (2)(2)+(2)(10) T1 = 10+50 T2 = 4+20 T1 = 60 T2 =24 T1-T2 = 60-24 = 36
T = ma+mg
T2 cos = mg T2 = mg/cos T2 = mgcos
Ft = mg
4200 J = 100 k * L L = 4200/100 L = 42
Q = mL