Jinan national fitness center to the zoo to take a few bus

1. Unknown_Error

2. I just answered a similar question. The command is: testfor @ a {inventory: [{ID: item, D] amage:0s ,C ount:1 (output when the stack reaches this number) B}]}
or / clear @ a item 0 1
and then a command box kill

3.

It's my honor to answer for you

my world command Encyclopedia: kill

/ Kill Command: defeat a specific entity

< HR / >

usage: chat bar, command box: kill all @ a players, @ P recent players, @ s himself, @ r random players @E all entities

< HR / >

example: kill @ a beat all players

/ kill @ P beat the nearest player

/ kill guj beat guj

/ kill @ E [type = pig] beat pig

/ kill @ a [R = 5= Guj] defeat players within radius 5 except guj

< HR / >

the answer is virtue, adoption is respect. You can move your hands and pay attention to me. If you have any questions, please send a private letter

4. Type = arrow: clear only entities & quot; arrow" Let me remind you that [type = arrow] is directly connected to the previous @ e, no spaces!) Of course, you can also use this command to clear other entities, such as zombies. The entity ID of zombies is zombie (PE version only), so it's not easy to type / kill @ E [type = zombie]. It's not the case that the server will not drop when it dies, and then the backpack items will be automatically cleared when it is reborn. In fact, I've come up with a solution before, But look at you are the first to answer and play the same command, how much of your QQ, I add you, I believe you must also need to ask me, help each other, if you say the removal of objects means to remove all the falling objects on the ground, then do not give an example, this is the command, you can lose. There is no such instruction in the original version, but if you are a server, you can install the scavenger plug-in. It should be able to provide relevant instructions, and you may not need to use the command box to set it

5. Do you see any displacement in the direction of the support force? If not, the support force does not work

6.

My world's command to kill players with command box is as follows:

there are two cases:

1, version 1.8 and above, and the mode is survival mode (it can't be killed in creation mode), the command is: kill @ p

kill: kill

@ P: the latest player

2, version 1.8 and below, and the mode is survival mode (it can't be killed in creation mode), The command is: effect @ p 7 1 200

effect: give players an effect

@ P: the latest player

7: ID of instant damage buff

1: time, 1 is one second, 2 is two seconds, but enter 99999 is infinite time

200: buff level, that is, 200 damage to players, The player's life value is only 100

{rrrrrrr}

extended data:

several commands commonly used in my world:

1, / gamemode 0 / 1 / 3: change game mode, 0 corresponds to survival mode, 1 corresponds to creation mode, 3 corresponds to observer mode

2, / time set time: change the current time of the game, such as / time set 0, that is, set the time to day

3, / TP X Y Z: transfer yourself to a place, such as / TP 235 70 326, that is, to the position with X coordinate 235, y coordinate 70 and Z coordinate 326

4, / weather clear / rain / Thunder / storm / Sun: change the weather instruction, clear means rain stop, rain means rainy day, thunder means thunderstorm, storm means snow day, sun means sunny day

5, / setblock x, y, Z block ID: set the block in a certain position, x, y, Z represent the coordinate position of the block, and different block IDS correspond to different blocks

7. Analysis: the floor of the escalator is horizontal. When people stand on the floor and move up with the escalator at a constant speed, they are only affected by gravity and supporting force, and the resultant force is 0
it can be seen that in this problem, support does positive work for people, that is, w = f * H = mg, H = 60 * 10 * 5 = 3000 joules
gravity does negative work for people, that is, w weight = - Mg * H = - 60 * 10 * 5 = - 3000 joules

8. The key depends on whether the direction of the supporting force and the displacement of the stressed object is vertical. If it is vertical, work will not be done, otherwise work will be done. The object displacement is based on the ground

9. In this case, still don't think about the work of support
even if the object moves along the curve, the supporting force (vertical contact surface, i.e. along the radial direction) is always perpendicular to the velocity direction (along the tangent direction), so the supporting force does not do work.