I just stood up like this, motionless, did I do my work?

Standing still did no work, and the horizontal bar was not suspended. Not all energy expenditure is called work. The work must involve the transformation of mechanical energy.

Think about it, if there is force and distance, it means that if the object moves, then the kinetic energy or gravitational potential energy of the object must change (there is energy converted into mechanical energy, or mechanical energy is converted into other energy). When you stand still, the energy consumed is directly converted into internal energy, which is not called work, and the horizontal bar is suspended in the air. For example, a small motor, when it rotates, the electrical energy is converted into mechanical energy and does work, but you force it to grasp it and do not let it turn, and all the electrical energy is consumed by the internal resistance of the motor and converted into internal energy, which is obviously not work.

When you stand up, you have to contract or stretch a lot of muscles.

In that case, muscle movement also requires energy.

And then again, if you're tired, it's possible that the muscles are doing anaerobic respiration and producing lactate.

It's all about energy, and it's all about energy conversion.

And in the energy conversion, there is heat dissipation, heat loss.

That's how to do it.

There are a range of energy transformations, both biological and physical.

Your feelings are unfelt, but they do happen.

So it can't be based on whether you feel tired or if you exercise.

to judge whether you have done work.

You didn't do the work, you just used the force to maintain the balance, and there was no distance in the direction of the force, and the cause of the soreness was just as said on the upper floors.

After doing the work, the center of gravity rises when you stand up, and you do the work by overcoming gravity.

Holding the horizontal bar in his hand, he doesn't do any work.

Now that you know it's not a simple physics problem, why do you still ask?

And it has to do with the biology -- you don't feel it, and when you move your muscles, you produce lactic acid, and you get tired.

The displacement of the support force is 0, the displacement of the center of gravity is not 0, and the chemical energy in the muscle is converted into gravitational potential energy.

Gravity does the work because the center of gravity changes by position.

Because the stress point does not move. It's the muscles that do the work.

In fact, it is the energy of the working object that is transferred to the rock to touch the working object.

For example, if an object falls freely by gravity and ignores air resistance, the Earth does work on it, and the gravitational potential energy between the Earth and Euluta decreases -- the gravitational potential energy of the Earth decreases, but the kinetic energy of the system that he and the Earth make up (i.e., its velocity plus the velocity of the Earth) increases—the kinetic energy of the object increases, and in short, the Earth transfers its gravitational potential energy to the falling object. That is, there is a conversion of energy between the system of two objects, he and the earth.

According to you, it should be said as "......The energy of the object being done is given "more appropriately."

Matter is indestructible. It can be said to be transformed. It can't be said to disappear.

The basketball is inertial, and the missile has a distance to move in the direction of gravity, doing work on gravity.

During the shooting process, the basketball moves due to inertia. Missiles are traction to do the work.

Because the basketball doesn't work when it leaves the hand.

The missile has the effect of gunpowder giving it force all the time.

Acting on the object, the object moves in the direction of this force.

If the brick does not move some distance in the direction of the force, there is no workmanship. Soreness in the arm is a biological problem.

I did it, I must have done it- The arm soreness is caused by the accumulation of lactic acid in the muscles, which is not smooth.

There is no work done, and the product of the displacement in the direction of the force and force is called work, and the process is the vertical force and the horizontal position is wide and respectful, so no work is done.

Work is not the same as energy, and in the process, I feel tired because of the consumption of physical energy.

Failure to do work refers to not doing work on the bucket.

But the process is actually done.

Including the heat work generated by muscle activity, as well as lifting the bucket to give the bucket Bi Ming an initial velocity, doing work in the process.

Stopping the speed of the bucket at the end is actually doing negative work on the bucket. From the whole process, Li Hui sees that the positive and negative skills cancel each other out, so you will feel tired.

Carrying water did not do blind hunger and balancing exercises.

People will be tired because people do do work and limbs, even if they carry it without moving, the body is consuming energy, but it is all converted into heat and so on, and it is not used to grind on the bucket.

There is work. The amount of physical effort you exert is the amount of work you do. I can't tell which force is doing the work, I can only say that you are doing the work.

Because people are always providing a balance of force and gravity, they use energy, so they get tired.

That's right. According to the characteristics of the work done by gravity - it has nothing to do with the path, but only with the initial and final position of the object = the height difference, so the work done by gravity on the object is tabled.

W=mg(H2-H1)=MGH2-MGH1=EP2-EP1——W>0==>EP2>EP1: The amount by which the gravitational potential energy decreases and decreases is equal to the work of gravity; In the same way, if an object overcomes gravity to do work, then the gravitational potential energy of the object increases, and the amount of increase = the absolute value of work done against gravity.

The above conclusion is not related to any other factors.

There seems to be something wrong with this statement. Because the change in gravitational potential energy is related to external forces. When an external force overcomes gravity to do work (e.g., lifting a heavy object high), the gravitational potential energy of the object increases, and conversely, when gravity does work, the gravitational potential energy of the object decreases.

The change in gravitational potential energy is related to the work done by gravity, and has nothing to do with the amount of work done by other forces, this sentence is correct.

The change in gravitational potential energy is only related to the work done by gravity. wg=δep

It must have nothing to do with the work done by the force that is opposite to the direction of gravity.

This is to treat the two balls and the rod as a whole (similar to a rod with a ball at one end rotating around the other end of the rod), and of course the mechanical energy is conserved.

The motion of any object, regardless of any resistance, conforms to the law of conservation of mechanical energy, which is generally the conversion of kinetic energy and potential energy.

Regardless of resistance, only kinetic energy and kinetic energy are converted into each other, and even if there is support, it is a matter of elastic potential energy, of course, it follows the conservation of mechanical energy.

You give me a contact address and I'll send you an NBA2008 3D Audience Character Patch.

Picture? Or something else.

I don't know how weird the questions are being asked now.

If the effect is fully open, it is estimated that you can see standing up.

But it's still very national

Try it out with an aerial relay dunk.