Do a uniform linear motion uphill, the kinetic energy does not change, the potential energy increase

No, mechanical energy increases.

Because the mechanical energy is equal to the sum of kinetic energy and potential energy, in the process of the uphill movement of the object doing a uniform straight line, the kinetic energy of the object remains the same because the object maintains a uniform linear motion, and the kinetic energy remains the same, with the increase of the uphill height, the potential energy is also increasing, so under the condition that both kinetic energy and potential energy are increasing, the mechanical energy is to maintain an upward trend, not to remain the same.

Do a uniform linear motion uphill, the kinetic energy does not change, the potential energy increases, can the mechanical energy remain the same?

The kinetic energy does not change and the potential energy increases and the mechanical energy is equal to the sum of the two, which increases of course.

And because energy is conserved, there must be other energy converted into mechanical energy, such as a process in which chemical energy is converted into internal energy and then converted into mechanical energy when the car is going uphill. Complete!

The increased potential energy can be converted into internal energy by overcoming resistance and doing work! In the process of going uphill at a uniform speed, it may be subject to friction, at this time, the mechanical energy can be converted into the internal energy of the object, and the mass and speed of the object have not changed, so the kinetic energy has not changed, so the increased potential energy may be converted into internal energy, and the mechanical energy can be satisfied!

How can mechanical energy remain the same?

If the velocity remains constant, then the kinetic energy remains the same; The height is rising, so the potential energy is increasing.

So, the conclusion is: mechanical energy increases.

Correct Answer: Mechanical energy changes.

Straight uphill with uniform velocity is the effect of an external force If there is no external force, it is impossible to go uphill and return to a straight line with uniform velocity, and the speed should be slowed down.

Because the outside world does work on this system, the mechanical energy increases, and the increased mechanical energy is the gravitational potential energy.

Here the mechanical energy is equal to the sum of the kinetic energy and the gravitational potential energy.

The object does a uniform linear motion uphill.

Then the object must be subjected to an unbalanced external force.

Then this external force is converted into the gravitational potential energy of the object.

So in this movement the mechanical energy is not balanced.

The mechanical energy balance mentioned in the book is conditional.

That is, the condition that the object or system is not affected by external forces or only by gravity.

The object obeys the mechanical energy balance.

If you move at a constant speed and go uphill, your mechanical energy will definitely increase

It is impossible to remain unchanged!

Mechanical energy = kinetic energy + potential energy.

Now the situation is that your kinetic energy is not the same, the potential energy is increasing, and the mechanical energy is definitely increasing!!

Potential energy is intrinsic, invisible, and you imagine it as turning into heat, and it can only manifest itself when it falls!

This means that when it goes down, because the potential energy increases, the speed will get faster and faster!!

Mechanical energy can remain unchanged, and mechanical energy is balanced!

If there is no gravitational force, there will be no gravitational potential energy, so the mechanical energy will not change

Yes, there is a loss of energy, control it well, and the friction is good.

To do a uniform linear motion uphill, there must be an external force to do the work, since there is an external force, what kind of mechanical energy conservation.

Since it is uphill, the gravitational potential energy must increase.

But the kinetic energy remains the same, and the mechanical energy increases, why is that?

Because there must be work done by the outside world that gives energy to the object.

Got it?

Mechanical energy = kinetic energy + potential energy.

The kinetic energy remains the same, and the potential energy increases.

Do not say. Anyone can see this.

They are not converted into each other, and the mechanical energy should increase.

Linear motion with uniform velocity is a motion with constant acceleration, but motion with constant acceleration is not necessarily a linear motion, such as parabolic motion, where acceleration is acceleration due to gravity, which is a certain value, but not linear motion.

Whether it is a linear or curvilinear motion depends on the direction of velocity and the direction of the force, which is not in the same straight line, which is a linear motion with uniform variable speed, and not in the same straight line is a curved motion with uniform variable speed.

1) If the object moves in a uniform linear motion on the horizontal plane, the mass of the object does not change, the velocity does not change, the kinetic energy does not change, the height does not change, and the gravitational potential energy does not change when the object moves, and the potential energy of the elastic rot is not considered, so the mechanical energy = kinetic energy + gravitational potential energy, so the mechanical energy does not change

2) If the object moves in a straight line at a uniform speed in the vertical direction, the mass of the object remains the same, the velocity does not change, the kinetic energy does not change, the height becomes larger, and the gravitational potential energy becomes larger The elastic deformation does not occur when the object moves, and the elastic potential energy is not considered, so the mechanical energy = kinetic energy + gravitational potential energy, so the mechanical energy becomes larger

3) If the object moves vertically and vertically in a straight line, the mass of the object does not change, the velocity does not change, the kinetic energy does not change, the height becomes smaller, and the gravitational potential energy becomes smaller When the object moves, the elastic deformation does not occur, and the elastic potential energy is not considered, so the mechanical energy = kinetic energy + gravitational potential energy, so the mechanical energy becomes smaller

So when the object is subjected to a balancing force, the kinetic energy does not change; The potential energy of the heavy cherry blossom volt force may become larger, may not change, and may become smaller; Mechanical energy may become larger, it may not change, it may become smaller

Therefore, choose D

No, mechanical energy increases.

Because mechanical energy is equal to the sum of kinetic energy and potential energy, in the process of uphill movement of the object doing a uniform straight line, the kinetic energy of the object remains unchanged because the object maintains a uniform linear motion, and the kinetic energy remains unchanged, and with the increase of the uphill height, the potential energy is also increasing, so under the condition that the kinetic energy and the potential seepage energy are increasing, the mechanical energy is to maintain the upward trend, rather than remain the same.

Do a uniform motion.

Also uphill. Thy mechanical power shall be increased by rebitten

It is impossible to remain unchanged!

Mechanical energy = kinetic energy + potential energy.

Now the situation is that your momentum is the same.

The potential energy is increasing again.

The mechanical energy will definitely increase!!

Potential energy is intrinsic.

I can't see it. You think of him as turning into a heat put

It can only be manifested when it is down!

This means that when it falls, the potential energy increases.

It's going to get faster and faster!!

Correct answer: Machines can search and change randomly.

Uniform speed straight line uphill calendar.

It is the effect of an external force.

If there is no external force, it is impossible to go uphill and have a straight speed, and the speed should be slowed down.

Because the outside world does work on this system.

Increases the mechanical energy.

The increased mechanical energy is gravitational potential energy.

Over here. The mechanical trace spike energy is equal to the sum of kinetic energy and gravitational potential energy.

1: When going uphill, guess that the object will be subject to the sliding force and frictional resistance of gravity along the slope direction, both of which hinder the movement and the resultant force is a constant force, so the object moves in a straight line with uniform deceleration.

2: When going downhill, the sliding component of gravity acts as a dynamic force and is greater than the frictional force, and the resultant force of the two is also a constant force, so it does a uniform acceleration linear motion.

When the velocity changes, the kinetic energy does not necessarily change, for example, the kinetic energy of a uniform circular motion does not change, but the direction of the velocity keeps changing.

The condition for the conservation of mechanical energy is that there is no force to do work except gravity, spring elastic force.

The mechanical energy of an object moving in a linear motion at a uniform variable speed must be conserved": the object moves in a linear motion at a uniform variable speed under the condition of frictional force.

In conclusion, only the conservative force does work on the object, and the mechanical energy is conserved during the motion of the object.

The object moves in a straight line with uniform deceleration:

1.In the ascending process of the upward throwing motion--- only the work done by the conservative force gravity - the > mechanism can be conserved;

2.If an object moves in a straight line with uniform deceleration and deceleration on the horizontal plane, there must be a non-conservative force (such as friction) to do work on it - > mechanical energy is not conserved.

Not necessarily, but also depends on how the potential energy changes

Kinetic energy is related to mass, velocity, ifThe mass is constant, the velocity is constant, and the kinetic energy is constant.

The gravitational potential energy depends on which direction the object is moving towards the Sakura- i.e., raised, lowered, or leveled.

Elevated: The gravitational potential energy increases; When the stool staring energy remains unchanged, the mechanical energy increases;

Decrease: The gravitational potential energy decreases; When the kinetic energy is unchanged, the mechanical energy decreases;

Horizontal: The gravitational potential energy ridge is rough and blind; When the kinetic energy does not change, the mechanical energy does not change either.

Kinetic energy is certain and constant.

The mechanical energy and the potential energy of the hand are uncertain

For example: 1: If an object moves in a uniform linear motion on a horizontal ground, the potential energy and mechanical energy of the object remain unchanged.

2: If an object moves vertically upwards at a uniform linear speed, the potential energy of the object and the energy of the limb will both increase

3: If an object moves vertically downwards at a uniform linear speed, the potential energy and mechanical energy of the object decrease.

There are three scenarios.

1.The kinetic energy of the object moving at a uniform speed in the horizontal plane does not change, the gravitational potential energy does not change, and the mechanical energy does not change.

2.The kinetic energy of the object moving at a constant speed remains unchanged, the gravitational potential energy increases, and the mechanical energy increases.

3.The kinetic energy of the object is not changed, the gravitational potential energy is reduced, and the mechanical spine can be reduced.