Mouvement et interactions - 3e

Modéliser une action par une force

Exercice 1 : Dessiner un segment fléché force (lancer de poids)

On s'intéresse à un athlète adepte du lancer de poids. On modélise le poids par un cercle de centre \( C \) de rayon \( 3 cm \) et de masse \( 5 kg \).

Dessiner le segment fléché représentant le poids du poids.
On arrondira à \( 10N \) près et on prendra 1 carreau pour \( 10N \).

Exercice 2 : Dessiner le segment fléché représentant la force modélisant l'interaction graviationnelle

Tracer, dans le schéma ci-dessous, le segment fléché représentant la force modélisant l'interaction gravitationnelle exercée par la Lune sur la Terre.

{"init": {"range": [[-10, 10], [-10, 10]], "scale": [30, 30]}, "line": [[[-10.0, -10.0], [10.0, -10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -9.0], [10.0, -9.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -8.0], [10.0, -8.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -7.0], [10.0, -7.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -6.0], [10.0, -6.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -5.0], [10.0, -5.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -4.0], [10.0, -4.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -3.0], [10.0, -3.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -2.0], [10.0, -2.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -1.0], [10.0, -1.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 0.0], [10.0, 0.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 1.0], [10.0, 1.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 2.0], [10.0, 2.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 3.0], [10.0, 3.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 4.0], [10.0, 4.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 5.0], [10.0, 5.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 6.0], [10.0, 6.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 7.0], [10.0, 7.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 8.0], [10.0, 8.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 9.0], [10.0, 9.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 10.0], [10.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -10.0], [-10.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-9.0, -10.0], [-9.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-8.0, -10.0], [-8.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-7.0, -10.0], [-7.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-6.0, -10.0], [-6.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-5.0, -10.0], [-5.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-4.0, -10.0], [-4.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-3.0, -10.0], [-3.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-2.0, -10.0], [-2.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-1.0, -10.0], [-1.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[0.0, -10.0], [0.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[1.0, -10.0], [1.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[2.0, -10.0], [2.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[3.0, -10.0], [3.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[4.0, -10.0], [4.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[5.0, -10.0], [5.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[6.0, -10.0], [6.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[7.0, -10.0], [7.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[8.0, -10.0], [8.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[9.0, -10.0], [9.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[10.0, -10.0], [10.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}]], "label": [[[0.0, 0.0], "Terre", "above", {}], [[4.0, 4.0], "Lune", "above", {}]], "circle": [[[0.0, 0.0], 0.2, {"fill": "black"}], [[4.0, 4.0], 0.2, {"fill": "black"}], [[0.0, 0.0], 5.656854249492381, {}]], "drawing_options": {"tools": ["vector"]}}

Exercice 3 : Dessiner la force gravitationnelle entre deux objets

On représente ci-dessous le schéma de deux corps.
Le segment fléché \( F_{B/A} \) représente la force d'attraction gravitationnelle du corps \( B \) sur le corps \( A \).

Représenter de la même manière la force d'attraction gravitationnelle du corps \( A \) sur le corps \( B \) : \( F_{A/B} \).

Exercice 4 : Dessiner un segment fléché force (lancer de poids)

On s'intéresse à un athlète adepte du lancer de poids. On modélise le poids par un cercle de centre \( C \) de rayon \( 1 cm \) et de masse \( 5 kg \).

Dessiner le segment fléché représentant le poids du poids.
On arrondira à \( 10N \) près et on prendra 1 carreau pour \( 10N \).

Exercice 5 : Dessiner le segment fléché représentant la force modélisant l'interaction graviationnelle

Tracer, dans le schéma ci-dessous, le segment fléché représentant la force modélisant l'interaction gravitationnelle exercée par la Lune sur la Terre.

{"init": {"range": [[-10, 10], [-10, 10]], "scale": [30, 30]}, "line": [[[-10.0, -10.0], [10.0, -10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -9.0], [10.0, -9.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -8.0], [10.0, -8.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -7.0], [10.0, -7.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -6.0], [10.0, -6.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -5.0], [10.0, -5.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -4.0], [10.0, -4.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -3.0], [10.0, -3.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -2.0], [10.0, -2.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -1.0], [10.0, -1.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 0.0], [10.0, 0.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 1.0], [10.0, 1.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 2.0], [10.0, 2.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 3.0], [10.0, 3.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 4.0], [10.0, 4.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 5.0], [10.0, 5.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 6.0], [10.0, 6.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 7.0], [10.0, 7.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 8.0], [10.0, 8.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 9.0], [10.0, 9.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, 10.0], [10.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-10.0, -10.0], [-10.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-9.0, -10.0], [-9.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-8.0, -10.0], [-8.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-7.0, -10.0], [-7.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-6.0, -10.0], [-6.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-5.0, -10.0], [-5.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-4.0, -10.0], [-4.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-3.0, -10.0], [-3.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-2.0, -10.0], [-2.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[-1.0, -10.0], [-1.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[0.0, -10.0], [0.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[1.0, -10.0], [1.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[2.0, -10.0], [2.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[3.0, -10.0], [3.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[4.0, -10.0], [4.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[5.0, -10.0], [5.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[6.0, -10.0], [6.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[7.0, -10.0], [7.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[8.0, -10.0], [8.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[9.0, -10.0], [9.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}], [[10.0, -10.0], [10.0, 10.0], {"subtype": "segment", "stroke": "#ccc"}]], "label": [[[0.0, 0.0], "Terre", "above", {}], [[-4.0, -4.0], "Lune", "above", {}]], "circle": [[[0.0, 0.0], 0.2, {"fill": "black"}], [[-4.0, -4.0], 0.2, {"fill": "black"}], [[0.0, 0.0], 5.656854249492381, {}]], "drawing_options": {"tools": ["vector"]}}

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