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Anonymous users2024-02-11Your question is wrong. When a group of people has a pull force of 18,000 N, the pull of an elephant cannot be 20,000 N, and the two are always equal in size. If the maximum pulling force of an elephant is 20000N
The maximum pull force for a group of people is 18000N. Then the maximum force of the rope is 18000N. Done: Thank you.
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Anonymous users2024-02-10The resultant force can be calculated as 2000N.
The rope is a stressed object, and it is enough to directly analyze the resultant force of the force. However, this rope is a rope whose mass cannot be ignored, but its gravity is negligible. The gravitational force is small relative to the tensile force and can be ignored, but the mass of the rope cannot be ignored, otherwise there will be an infinite acceleration.
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Anonymous users2024-02-092000, according to the force analysis, the direction of the two forces is opposite, and the resultant force is the difference between the two, so it is 20000-18000=2000
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Anonymous users2024-02-08Of course it is a smaller force of 18000
The rope does not take into account its own mass is forcefully unbalanced and there is acceleration, and the unbalanced net force is zero.
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Anonymous users2024-02-07It's 2000, you just need to consider the imbalance of the force at this time, and there should be acceleration.
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Anonymous users2024-02-06The resultant force is 2000 N, providing its acceleration.
The internal tension is 18,000 N (Lou Da refers to the action and reaction forces reflected here).
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Anonymous users2024-02-05Since it is the resultant force is subtracted by 2000, the rope seems to be more confusing. It is better to change it to a wooden block to a left 20000 and a force to the right 18000Be clear this way.
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Anonymous users2024-02-042000 Ah, the difference between the two interaction forces.
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Anonymous users2024-02-03It is easy to explain by the physical formula: q=c*m*t
Wherein: q is heat; c is the specific heat capacity; m is the mass; t is the difference between the elevated temperature, which is the temperature after the change minus the temperature before the change;
q1=c1*m1*t1;q2=c2*m2*t2, the simplest way to make c1 is 1 and t1 is 3, and it is easy to get the answer to be d3:4
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Anonymous users2024-02-021.Under the action of constant resultant external force and drag, the acceleration is A11 2A1(4) = 8m
a1=1m/s²
After turning off the engine, the speed of turning off the engine is 4m s and the car moves for 2s to stop, and the acceleration is a2 = 2m s drag f = 2 * 2000 = 4000n
f (traction) - f = 2000*1
f=6000n
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Anonymous users2024-02-01There are the answers and processes you need!!
Gravity is not equal to the gravitational pull of the Earth on an object. Due to the rotation of the earth itself, in addition to the poles, the objects in other places on the ground are moving in an approximate uniform circular motion around the earth's axis together with the earth, which requires a centripetal force directed perpendicularly to the earth's axis, and this centripetal force can only be provided by the earth's gravitational force on the object, and we can decompose the earth's gravitational force on the object into two components, one component f1, which points to the earth's axis, and the magnitude is equal to the centripetal force required for the object to move in an approximate uniform circular motion around the earth's axis; The other component g is the gravitational force on the object, where f1 = mw2r (w is the angular velocity of the earth's rotation and r is the radius of rotation of the object), and it can be seen that the magnitude of f1 is zero at the poles, increasing with the decrease of latitude, and the maximum f1max is in the equatorial region. Because the centripetal force of the object is very small, in general, it can be approximated that the gravitational force of the object is equal to the gravitational force, that is, the influence of the rotation of the earth can be omitted in general. >>>More
Choose A, B, C
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As shown in the figure, the movable pulley is directly connected to it by two sections of rope, the middle section of the rope and the right section of the rope are upward on the moving pulley, and the upward pull force of each section of rope on the weight (pulley weight is not counted) is f, so 2f=g. >>>More