gabarito_prova-1_22028_turmaI.pdf

# gabarito_prova-1_22028_turmaI.pdf - Fsica 1 Experimental...

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Física 1 Experimental Gabarito da 1ª Prova Turma I - 2/2018 1. Largura do Retângulo: (79,35±0,03)mm 2. ( a ) A melhor estimativa para o alcance será a média simples das medidas de R ( R ) . R = (64,40+64,30+64,20+…+43,60+44,10)/10 = 64,04500 cm A incerteza de R R ) = (desvio padrão de ( R ) ) + erro instrumental Δ R = ( 64,40 R ) 2 +( 64,30 R ) 2 + ... +( 63,60 R ) 2 +( 64,10 R ) 2 10 ( 10 1 ) + 0,05 Δ R = 0,687204482 9,486832981 + 0,05 = 0,122437713 ⇒Δ R = 0,1 cm Finalmente, R =( 64,0 ± 0,1 cm ) ( b ) Adotaremos um sistema de coordenadas com o eixo y vertical para cima, na direção de H e o eixo x horizontal para a direita, na direção de R . (veja a figura da folha de questões). A projeção domovimentodabolinhanoeixo xé um MRU : x = x 0 + v 0 x t R = 0 + v 0 x t queda v 0 x = v 0 = R t q A projeção domovimentonoeixo y é um MRUV : y = y 0 + v 0 y t + 1 2 at 2 . Se y 0 = H e y = 0 t = t queda = t q 0 = H + 0 × t q 1 2 gt q 2 t q = 2 H g = 2 × 0,90 9,78 = 0,42900941686 s Δ t q = | t q H | Δ H + | t q g | Δ g ( Vamos considerar Δ g = 0 ) Δ t q =

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