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Sonja [21]
3 years ago
9

AMICA 3º ESO 1. Un muelle elástico de constante de elasticidad de 75 N/m, tiene una longitud de 46 cm cuando se le aplica una fu

erza de 7,5 N. Determinar:
Physics
1 answer:
Ludmilka [50]3 years ago
6 0

Answer:

Ver explicacion

Explanation:

Primero tenemos que determinar la longitud original del resorte.

De la ley de Hooke;

F = Ke

F = fuerza aplicada

K = constante de fuerza

e = extensión

Pero extensión = longitud final - longitud original

e = F / K

e = 7,5 N / 75 Nm-1

e = 0,1 m

Por eso;

Longitud original = longitud final - extensión

Longitud original = (46 * 10 ^ -2) m - 0,1 m

Longitud original = 0,36 m

b) la mitad de la fuerza aplicada es 3.75 N pero la constante de fuerza permanece igual.

Por eso;

e = F / K

e = 3,75 N / 75 Nm-1

e = 0,05 m

Longitud final = Longitud original - extensión

Longitud final = (46 * 10 ^ -2) m - 0.05 m

Longitud final = 0,41 m

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