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lys-0071 [83]
3 years ago
12

1Calcula la fuerza necesaria para subir un peso de 500 N con una palanca si el brazo de potencia mide 3 mt y el de resistencia 1

,5 mt.
2. Tenemos una palanca de 1,5 mts de largo, con el punto de apoyo a 0,5 mt de la carga. Si disponemos de una máquina que aplica una fuerza de 400 N; que peso máximo podriía levantar.
3. Una persona de 60 Kg y otra de 40 están sentadas en un balancín de un parque de forma que la primera está a 2 mt del punto de apoyo. A que distancia del punto de apoyo debe sentarse la segunda persona para que el balancín esté en equilibrio. Dibujar el esquema.
4. Se tiene una piedra de 30 Kg para levantarla con una palanca de 1,8 mt de larga. Si la palanca se apoya a 0,8 mt de la piedra, cuál debe ser la fuerza aplicada para levantar la piedra?.


hay alguien de taaaan buen corazón por 20 pnts
Physics
1 answer:
Zepler [3.9K]3 years ago
4 0

Answer:

Next we come to calculating the mechanical advantage of a lever. To do this, you divide the distance from the fulcrum, the point at which the lever pivots, to the applied force by the distance from the fulcrum to the resistance force.

Explanation:

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The variation of kinetic energy of the charge is equal to the sum of the work done by the two forces:

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and since the charge starts from rest, K_i = 0, so the formula becomes

K_f = W+q\Delta V

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