Gravesande, Willem Jacob 's - Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1

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10955MATHEMATICA. LIB. I. CAP. XV. parallelo retineri ut quieſcat, plano ſuſtinetur, id eſt quaſi
pellitur, juxta directionem dc plano perpendicularem, tan-
dem gravitate verticaliter per ce conatur deſcendere. Cor-
pus ergo P tribus quaſi trahitur potentiis, quarum directio-
nes lateribus trianguli ced parallelæ ſunt, ſed corpus qui-
eſcit, ſunt idcirco potentiæ inter ſe ut latera hujus triangu-
11210. li. Ideo, vis qua corpus ſuper plano conatur deſcendere 22238. ad vim qua verticaliter conatur deſcendere, pondus nempe
corporis, ut de ad ce aut ut AC ad AB, id eſt, ut alti-
tudo plani ad hujus longitudinem, ſunt enim ſimilia triangula
rectangula cde, ABC, habentia angulos æquales ced, CAB .

3329. El. I.

Machina,

Qua plani inclinati affectiones exhibentur.

Planum NOQL in ſitu ponitur horizontali; Planum AB
44239. IH circa cardines volvitur, & ad inclinationem quam-
55TAB. X.
fig. 5. cunque conſtituitur, ope cochleæ V & quadrantis circu-
li t.

Regula lignea EF extremitati uni trochleam connexam
habet G; circa alteram volvitur; caputque D, in quo mo-
vetur, ubique in ſciſſura rs, cum plano NOQL connecti-
tur, auxilio cochleæ infra planum.

M eſt cylindrus ligneus, cujus axis eſt chalybeus, & cu-
jus baſes cylindrum paululum excedunt; ita ut in revolu-
tione ſuper plano ABIH baſes ſolæ planum tangant.

Suſtinetur cylindrus filo tranſeunte ſuper trochlea G; quod
filum annectitur regulæ tenui æneæ, ita inflexæ, ut per e-
jus extremitates axis cylindri tranſeat, & rotetur.

In Experimentis ita diſponitur trochlea, inclinando re-
gulam EF, & movendo caput Dper ſciſſuram rs; ut fi-
lum, quo cylindrus ſuſtinetur, ſit parallelum plano inclina-
to ABIH.

Experimentum 7.

Inclinetur utcumque planum ABIH, pondus corporis
66240. Meam habet rationem ad pondus P, quam longitudo plani
AB ad illius altitudinem AC; & pondere P corpus M ſuſti-
ne tur ſuper plano inclinato, ubicunque ponatur.

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114	57
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116	59
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118	61
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121	64
122
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125	65
126	66
127	67
128	68
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130	70

Scan	Original
101	50
102
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105	51
106	52
107	53
108	54
109	55
110	56
111
112
113
114	57
115	58
116	59
117	60
118	61
119	62
120	63
121	64
122
123
124
125	65
126	66
127	67
128	68
129	69
130	70

Scan	Original
101	50
102
103
104
105	51
106	52
107	53
108	54
109	55
110	56
111
112
113
114	57
115	58
116	59
117	60
118	61
119	62
120	63
121	64
122
123
124
125	65
126	66
127	67
128	68
129	69
130	70