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Physics, 21.02.2021 16:20 cynthiafchs9203

A: MA:_204
TURNO: Ampoll DATA: 2012/2021
FISICA
1) Um carro percorre um trecho de 30 Km de uma estrada horizontal retilinea, mantendo uma
velocidade constante de 60 Km/h. A seguir, percorre 60 Km em linha reta, mantendo uma
velocidade constante de 40 Km/h. Qual a velocidade escalar media, em km/h, para o
percurso ?
2) Dois motociclistas, A e B. partem de um mesmo ponto de uma estrada retilinea e horizontal,
com velocidades constantes e iguais a 36 Km/h e 108 Km/h, respectivamente. Sabendo-se
que se movem no mesmo sentido e que o motociclista B parte 3 s após a partida de A.
determine:
a) o instante no qual os dois motociclistas se encontram após a partida de A
b) A posição do encontro
3) O dispositivo da figura é conhecido como máquina de Atwood e consiste de uma polia
de um cordão leve e dois corpos de massas ma = 1 kg e ms = 4Kg, presos nas extremid
do cordão. Considerando desprezíveis os atritos e g = 10 m/s2
a) Calcule a aceleração do sistema.
b) Determine a intensidade da tração no fio que liga os dois corpos.​

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A: MA:_204
TURNO: Ampoll DATA: 2012/2021
FISICA
1) Um carro percorre um trecho de 30...
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