第1章 静力学公理和物体的受力分析
1-1 画出下列各图中物体 A，ABC 或构件 AB，AC 的受力图。未画重力的各物体的自 重不计，所有接触处均为光滑接触。
(a)
(b)
(c)
(d)
(e)
F
N1
A
P
F N 2
(a1)
FT A P FN (b1)
A F N1 P B FN 3
FN 2
(c1)
FT B
FAy P1 A FP2 Ax
(d1)
FA
F
FB
A
B
(e1)
1
(f)
(g)
(h)
(i)
(j)
(k)
q
F FAy FB
A FAx B (f1)
F
B
C FC
FA
A
(g1)
FAy
FC
C
A
FAx
B
P
1
P2
(h1)
B F
C
FC
D
FAx
A
FAy
(i1)
B
(j1)
FB F C
FP Ay A FAx (k1)
2
FCA
C A
B FAB
A
′C FA
(l2)
′B FA
(l)
FAC
FBA
P (l3)
(l1) 图 1-1
1-2 画出下列每个标注字符的物体的受力图。题图中未画重力的各物体的自重不计，所 有接触处均为光滑接触。
C FN 2
(a)
B
′ FNB P2
(a1)
FN1 FN 1
C
FN 2
FN
P1
P2
FAy
P1
A
F
Ax
(a3)
FAy A FAx
(a2)
FN1 A P1 B P2 FN 3
(b)
′ FNFN 2 (b1)
FN1 A B FN 3
P2
P1 FN FN 2 (b3)
(b2)
3
FAy
A FAx
P1
C D FN 2 P2
(c)
FN1 (c1)
FAy
D A FAx
FN 2
B ′ FT
FN1
P1 P2
(c2) (c3)
FAy
A FAx C q D FB B
FAy
(d)
FDy
FC (d1)
A FAx q C FDx D FC
D q FB B
′x FD(d3)
′y FD
q B P FCx (e1)
FAx
′x FB
(d2)
FAy
FAx
FAy
B ′y FBP FCy A q B FBy (e2)
A FBx
FCx C FCy
(e)
C (e3)
F1 C FAy F2 FBy
(f)
A FAx
(f1)
FBx
B
4
F1
FAy A FCx
C
C ′x FC FCy
′y FC F2 FBy
FAx (f2)
(f3)
B FBx
FAy
FB C FAx
A B
(g)
P (g1)
′y FCFT
FAx FAy
A D FT FCx (g2) FB C B
C FCx ′
P
(g3)
D
FCy
C
FB′
F1
FB F2
B
FCx
B
FAy
(h)
A
FAx
(h1)
(h2)
A
FAy FCx FAx
FCy C
FC′y FOy FOx C A E (i2)
FE F
D
(i)
O FC′x B (i1)
5
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