The answer is yes. You know this because the table isn't moving or rotating.
Answer:
a) about 14.577 kg
b) 300 N
Explanation:
b) In order for the acceleration to be the same for each mass, the 800 N force must be divided between the boxes in proportion to their mass. That is, the net force on the 5M mass must be 5/8 of the total force, or 500 N. Then the tension in the rope is 800 N -500 N = 300 N, which is 3/8 of 800 N.
Tension: 300 N
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a) The total mass is 8M, and the total normal force on the floor is ...
F = ma = (8M)(9.8 m/s^2)
The friction force is 0.7 times this, and is equal to the 800 N force pulling on the boxes.
800 N = (8M)(9.8 m/s^2)(0.7)
M = 800/(8·9.8·0.7) kg ≈ 14.577 kg
Responder:
50A
Explicación:
Dado que el Um chuveiro y el microondas están conectados en paralelo, el mismo voltaje fluirá a través de ellos.
La potencia total consumida por ambos aparatos = 4800W + 1200W
La potencia total consumida por ambos aparatos = 6000W
Para obtener el I actual, usaremos la fórmula;
P = IV
6000 = 120I
Yo = 6000/120
Yo = 50 A
Por lo tanto, la medición de corriente del amperímetro ideal A será 50A
