RECUPERAÇÃO DE FÍSICA 1º ANO - ( MANHÃ -2013)
Autor: Elicio Chaves | Publicado: 2014-01-13T12:33:00-08:00

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Item 1-.(PROF.Elício) Considere as seguintes forças aplicadas a um
corpo:


 
 
  
  
  
  
  
  
  
  
  
  
  
  
 
 
 

 


Qual é a
força resultante aplicada?

 

a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2 N&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c) 4 N&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; e) 6 N

b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3 N&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; d)&nbsp; 5 N

ITEM 2-. (UNESP) As estatísticas indicam que o uso do cinto de
segurança deve ser obrigatório para prevenir lesões&nbsp;mais graves em
motoristas e passageiros no caso de acidentes. Fisicamente, a função do cinto
está&nbsp;relacionada com a:&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
a) Primeira Lei de Newton; 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) Lei de Snell; 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c) Lei de Ampère; 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; d) Lei de Ohm; 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; e) Primeira Lei de Kepler. &nbsp;&nbsp;



ITEM 3- (ITA) As leis da Mecânica
Newtoniana são formuladas em relação a um princípio fundamental, denominado:&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a)
Princípio da Inércia; &nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp; b) Princípio&nbsp; da Conservação da Energia Mecânica;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;c) Princípio da Conservação da Quantidade de
Movimento; 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;d) Princípio da Conservação do Momento Angular; 
&nbsp;&nbsp; &nbsp; e) Princípio da Relatividade: "Todos os referenciais
inerciais são equivalentes, para a formulação da
Mecânica&nbsp;Newtoniana". &nbsp; 

ITEM 4- (Unitau-SP)
Analise as afirmações a seguir e assinale a alternativa correta: 
I - Massa e peso são grandezas proporcionais. 



II - Massa e peso variam inversamente. 



III - A massa é uma grandeza escalar e o peso uma
grandeza vetorial. 



a) Somente I é correta.



b) I e II são corretas.



c) I e III são corretas.



d) Todas são incorretas. 



e) Todas são corretas. 



ITEM 5-. -(PUC-MG) Abaixo, apresentamos três
situações do seu dia-a-dia que devem ser associados com as três leis de Newton.

1. Ao pisar no acelerador do seu carro,
o velocímetro pode indicar variações de velocidade.
2. João machucou o pé ao chutar uma pedra.
3. Ao fazer uma curva ou frear, os passageiros de um ônibus que viajam em pé
devem se segurar.

A) Primeira Lei, ou Lei da Inércia.
B) segunda Lei ( F = m . a )
C) Terceira Lei de Newton, ou Lei da Ação e Reação.
A opção que apresenta a sequência de associação correta é:
a) A1, B2, C3
b) A2, B1, C3
c) A2, B3, C1
d) A3, B1, C2
e) A3, B2, C1

ITEM 06-. (FUND. CARLOS CHAGAS) Uma folha de papel está sobre a mesa do professor.
Sobre ela está um apagador. Dando-se, com violência, um puxão horizontal na
folha de papel, esta se movimenta e o apagador fica&nbsp;sobre a mesa. Uma
explicação aceitável para a ocorrência é:&nbsp;

&nbsp;a)
nenhuma força atuou sobre o apagador; 
&nbsp;b) a resistência do ar impediu o movimento do apagador; 
&nbsp;c) a força de atrito entre o apagador e o papel só atua em movimentos
lentos; 
&nbsp;d) a força de atrito entre o papel e a mesa é muito intensa; 
&nbsp;e) a força de atrito entre o apagador e o papel provoca, no apagador, uma
aceleração muito inferior à da folha de papel.