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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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Answer all of them an you will get the brain list
Vlad [161]

Answer:

4. Force = 178.6 Newton.  

5. Acceleration = 2.28 m/s².

6. Force = 178.6 Newton.

Explanation:

4. Given the following data;

Acceleration = 3.8 m/s²

Mass = 47kg

Force = mass * acceleration

Force = 47 * 3.8

<em>Force = 178.6 Newton. </em>

5. Given the following data;

Force = 785N

Mass = 345kg

Acceleration = force/mass

Acceleration = 785/345

<em>Acceleration = 2.28 m/s²</em>

6. Given the following data;

Acceleration = 6m/s²

Force = 32N

Mass =force/acceleration

Mass = 32/6

<em>Mass = 5.33 kilograms </em>

5 0
3 years ago
An object with a mass of 20 kg has a net force of 80 N acting on it. What is the acceleration of the object?
alexdok [17]
Newton's 2nd law of motion says

                   Net force = (mass) x (acceleration)

Plug in the things you know, and you have

                   80 N  =  (20 kg) x (acceleration)

Divide each side by (20 kg) :

                  80N / 20kg  =  acceleration

                   acceleration  =  4 m/s²
4 0
3 years ago
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A human heart beats once in 0.8 seconds. How many times it will beat in the life of 70 years.
Y_Kistochka [10]

Answer:

Explanation:

108,000 beats per hour

613,200 hours in 70 years

108,000 times 613,200 =

66225600000 beats

8 0
3 years ago
C) Explain the following.<br>Keftles, cooking pans and iron boxes have polished surfaces​
Monica [59]

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Polished surfaces reduce heat loss

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Two forces act on a 16 kg object. The first force has a magnitude of 68 N and is directed 24 degrees north of east. The second f
Vlada [557]

Answer:

The correct Answer to the question is : e) 4.1 m/s^2, 52 degrees north of east

Explanation:

F1= 68 N < 24º = 62.12 i + 27.65 j

F2= 32N < 132º = -21.41 i + 23.78 j

R= F1+F2= 40.71 i +51.43 j = 65.59 N < 51.63 º

By 2nd law of newton:

F= m * a

R= m*a

a= R/m

a= 4.1 m/s² < 52º  (52 degrees north of east)

I consideer 0º at the EAST axis.

4 0
3 years ago
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