{"id":3618,"date":"2018-02-13T12:38:32","date_gmt":"2018-02-13T12:38:32","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=3618"},"modified":"2024-11-12T12:48:01","modified_gmt":"2024-11-12T12:48:01","slug":"resolucao-comentada-conceitos-sobre-as-leis-de-newton","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/enem\/conceitos-sobre-as-leis-de-newton\/resolucao-comentada-conceitos-sobre-as-leis-de-newton\/","title":{"rendered":"Conceitos sobre as Leis de Newton EN"},"content":{"rendered":"

CONCEPTS ABOUT NEWTON’S LAWS<\/span><\/h1>\n
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Commented Resolution<\/span><\/b><\/p>\n

Concepts about Newton’s Laws<\/span><\/b><\/p>\n

01-\u00a0<\/span><\/b>The ship is in space (vacuum) free from gravitational forces \u2014 initially, when the ship moves from X to Y at constant speed (MRU), the resultant of all the forces acting on it is zero (consequence of the principle of inertia) \u2014 when the lateral engine is activated, a lateral force appears on the ship pulling it to the south but, at the same time, by inertia it continues to move to the east, making a movement in the southeast direction \u2014 when it reaches position Z (moving in the southeast direction) the engine is turned off and the resultant of the forces acting on the ship becomes zero and, by inertia, it moves in MRU in the southeast direction \u2014<\/b><\/span>\u00a0<\/b><\/b>\u00a0<\/b><\/p>\n

A- A<\/span><\/b><\/p>\n

02-\u00a0<\/span><\/b>Inertia in liquids \u2014 the liquid in the container on the left in the figure below is in equilibrium (horizontal level). If a resulting force to the right appears on it, accelerating it, due to inertia, the liquid level will acquire the shape shown in the figure on the right.<\/b><\/span>\u00a0<\/b><\/b><\/p>\n

\"\"<\/p>\n

\u2013 On the other hand, if the container + liquid are moving at a constant speed to the right and a resulting force appears on it to the left, braking it, the liquid, by inertia, will acquire the shape of the figure on the right.<\/span><\/b><\/p>\n

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