2 years ago

*Cupom 10% de desconto* em *todos os cursos online* do Estratégia Militares: QED
https://militares.estrategia.com/cursos/

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*1 Tópicos teóricos abordados*
• Movimento Retilíneo e Uniforme
• Movimento Uniformemente Variado

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*2 Enunciado*

(ITA/1983) Um móvel parte da origem do eixo x com velocidade
igual a 3 m/s. No instante t = 6 s, o móvel sofre uma aceleração
α = – 4 m/s². A equação horária a partir do instante t = 6 s será:

A) x = 3t – 2t²
B) x = 18 – 2t²
C) x = 18 + 3t – 2t²
D) x = –72 + 27t – 2t²
E) x = 27t – 2t²

Resposta: D).

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Quatro partículas deslocam-se com velocidades Va, Vb, Vc e Vd
constantes ao longo de uma mesma trajetória. As partículas A e B encontram-se às 8:00, as partículas A e C encontram-se às 10:00, as partículas A e D encontram-se às 12:00, as pa rtículas B e D encontram-se às 13:00, e as partículas C e D
encontram-se às 14:00.

Em que instante as partículas B e C se encontram?

Resposta: 11h 20min.

_Caso você tenha resolvido o problema por um caminho alternativo, não deixe de comentá-lo para assim enriquecermos a discussão_

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*3 Sugestão de problemas*

Envie uma sugestão de problema e eu a resolverei em vídeo – https://bit.ly/QED_forms

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