ATIVIDADE DE FÍSICA – 1° ANO_JUNHO_2012
Autor: DAMYAOONLINE | Publicado: 2012-06-26T10:03:00-07:00

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COLÉGIO
ESTADUAL FRANCISCA PEREIRA DE SOUSA MORAIS

DISCIPLINAS:
Física&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SÉRIE: 1º ano&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ano:&nbsp;
2012

PROFESSOR:
Damião Batista de Sá

Aluno(a)
__________________________________________ n° ______

Aluno(a)
__________________________________________ n° ______

Aluno(a)
__________________________________________ n° ______

Aluno(a)
__________________________________________ n° ______



---------------------------------------------------------------------------------------------------------------------------





ATIVIDADE DE FÍSICA – 1° ANO_JUNHO_2012





FUNÇÃO
HORÁRIA DAS POSIÇÕES DO M.U.V 



&nbsp;1.&nbsp;&nbsp; Um móvel descreve um MUV
numa trajetória retilínea e sua posição varia no tempo de acordo com a
expressão : s = 9 + 3t - 2t2. (SI) Determine: a posição inicial, a
velocidade inicial e a aceleração.



2.&nbsp; É dado um movimento cuja
função horária é: s = 13 - 2t + 4t2. (SI) Determine: a posição
inicial, a velocidade inicial e a aceleração.



3.&nbsp;&nbsp; A função horária de um móvel
que se desloca numa trajetória retilínea é s=20+4t+5t2, onde s é
medido em metros e t em segundos. Determine a posição do móvel no instante
t=5s.



4.&nbsp; Um móvel parte do repouso da
origem das posições com movimento uniformemente variado e aceleração igual a 2
m/s2. Determine sua posição após 6 s.



EQUAÇÃO DE TORRICELLI



&nbsp;1.&nbsp;&nbsp; Um automóvel possui num
certo instante velocidade de 10 m/s. A partir desse instante o motorista
imprime ao veículo uma aceleração de 3 m/s2. Qual a velocidade que o
automóvel adquire após percorrer 50 m?



2.&nbsp;&nbsp; Um automóvel parte do
repouso e percorre 256 m de uma rodovia com uma aceleração igual a 8 m/se.
Determine sua velocidade no final do percurso.



3.&nbsp;&nbsp; Um veículo tem velocidade
inicial de 4 m/s, variando uniformemente para 10 m/s após um percurso de 7 m.
Determine a aceleração do veículo.



4.&nbsp;&nbsp; A velocidade de um corpo em
MUV varia de 6 m/s a 9 m/s, num trajeto de 3 m. Calcule a aceleração do corpo.



EXERCÍCIOS
ENVOLVENDO AS EQUAÇÕES DO MUV



1.&nbsp;&nbsp;&nbsp; Um carro de corrida, que
estava parado, arranca com movimento retilíneo uniformemente acelerado. O valor
da sua aceleração é de 4 m/s2. Quanto tempo o carro gasta para
atingir a velocidade de 12 m/s ?



2.&nbsp;&nbsp; Ao pousar, um avião toca a
pista de aterrissagem com uma velocidade de 70 m/s. Suponha que seu movimento,
a partir desse instante, seja retilíneo uniformemente retardado, com aceleração
a = - 5 m/s2. Qual será a velocidade do avião 10 s após ele tocar o
solo?



3.&nbsp;&nbsp; Um carro, com movimento retilíneo
uniformemente acelerado, de aceleração a = 1,5 m/s2, partiu do
repouso. Qual a distância que o carro percorre em 4 s ?



4.&nbsp;&nbsp; Uma moto com velocidade
inicial de 20 m/s freia com aceleração igual a -2 m/s2. Escreva a
função horária da velocidade para esta moto.





QUEDA LIVRE

&nbsp; 

1.&nbsp;&nbsp; Um objeto cai do alto de um
edifício, gastando 7s na queda. Calcular com que velocidade atinge o solo (g=10
m/s2).



2.&nbsp;&nbsp; De uma ponte deixa-se cair
uma pedra que demora 2s para chegar à superfície da água. Sendo a aceleração
local da gravidade igual a g=10 m/s2 , determine a altura da ponte.



3.&nbsp;&nbsp; Num planeta fictício, a
aceleração da gravidade vale g=25 m/s2. Um corpo é abandonado de
certa altura e leva 7s para chegar ao solo. Qual sua velocidade no instante que
chega ao solo?



4.&nbsp;&nbsp; Um gato consegue sair ileso
de muitas quedas. Suponha que a maior velocidade com a qual ele possa atingir o
solo sem se machucar seja 8 m/s. Então, desprezando a resistência do ar, qual a
altura máxima de queda para que o gato nada sofra? ( g=10 m/s2).