Hf Velocity App Download
Ozie Harker
To have a constant velocity, an object must have a constant speed in a constant direction. Constant direction constrains the object to motion in a straight path thus, a constant velocity means motion in a straight line at a constant speed.
For example, a car moving at a constant 20 kilometres per hour in a circular path has a constant speed, but does not have a constant velocity because its direction changes. Hence, the car is considered to be undergoing an acceleration.
While the terms speed and velocity are often colloquially used interchangeably to connote how fast an object is moving, in scientific terms they are different. Speed, the scalar magnitude of a velocity vector, denotes only how fast an object is moving, while velocity indicates both an objects speed and direction.[1][2][3]
Velocity is defined as the rate of change of position with respect to time, which may also be referred to as the instantaneous velocity to emphasize the distinction from the average velocity. In some applications the average velocity of an object might be needed, that is to say, the constant velocity that would provide the same resultant displacement as a variable velocity in the same time interval, v(t), over some time period Δt. Average velocity can be calculated as:[4][5]
The average velocity is always less than or equal to the average speed of an object. This can be seen by realizing that while distance is always strictly increasing, displacement can increase or decrease in magnitude as well as change direction.
In terms of a displacement-time (x vs. t) graph, the instantaneous velocity (or, simply, velocity) can be thought of as the slope of the tangent line to the curve at any point, and the average velocity as the slope of the secant line between two points with t coordinates equal to the boundaries of the time period for the average velocity.
Since the derivative of the position with respect to time gives the change in position (in metres) divided by the change in time (in seconds), velocity is measured in metres per second (m/s). Although the concept of an instantaneous velocity might at first seem counter-intuitive, it may be thought of as the velocity that the object would continue to travel at if it stopped accelerating at that moment.
Although velocity is defined as the rate of change of position, it is often common to start with an expression for an object's acceleration. As seen by the three green tangent lines in the figure, an object's instantaneous acceleration at a point in time is the slope of the line tangent to the curve of a v(t) graph at that point. In other words, instantaneous acceleration is defined as the derivative of velocity with respect to time:[8] a = d v d t . \displaystyle \boldsymbol a=\frac d\boldsymbol vdt.
The above equations are valid for both Newtonian mechanics and special relativity. Where Newtonian mechanics and special relativity differ is in how different observers would describe the same situation. In particular, in Newtonian mechanics, all observers agree on the value of t and the transformation rules for position create a situation in which all non-accelerating observers would describe the acceleration of an object with the same values. Neither is true for special relativity. In other words, only relative velocity can be calculated.
Escape velocity is the minimum speed a ballistic object needs to escape from a massive body such as Earth. It represents the kinetic energy that, when added to the object's gravitational potential energy (which is always negative), is equal to zero. The general formula for the escape velocity of an object at a distance r from the center of a planet with mass M is[11] v e = 2 G M r = 2 g r , \displaystyle v_\texte=\sqrt \frac 2GMr=\sqrt 2gr, where G is the gravitational constant and g is the gravitational acceleration. The escape velocity from Earth's surface is about 11 200 m/s, and is irrespective of the direction of the object. This makes "escape velocity" somewhat of a misnomer, as the more correct term would be "escape speed": any object attaining a velocity of that magnitude, irrespective of atmosphere, will leave the vicinity of the base body as long as it does not intersect with something in its path.
Relative velocity is a measurement of velocity between two objects as determined in a single coordinate system. Relative velocity is fundamental in both classical and modern physics, since many systems in physics deal with the relative motion of two or more particles. In Newtonian mechanics, the relative velocity is independent of the chosen inertial reference frame. This is not the case anymore with special relativity in which velocities depend on the choice of reference frame.
In polar coordinates, a two-dimensional velocity is described by a radial velocity, defined as the component of velocity away from or toward the origin, and a transverse velocity, perpendicular to the radial one.[13][14] Both arise from angular velocity, which is the rate of rotation about the origin (with positive quantities representing counter-clockwise rotation and negative quantities representing clockwise rotation, in a right-handed coordinate system).
Angular momentum in scalar form is the mass times the distance to the origin times the transverse velocity, or equivalently, the mass times the distance squared times the angular speed. The sign convention for angular momentum is the same as that for angular velocity. L = m r v T = m r 2 ω \displaystyle L=mrv_T=mr^2\omega where
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That depends. Does this mean high compared to two weeks ago? High compared to the other teams in your organization? How do we even measure velocity accurately without it becoming just another metric that is gamed? I have often talked at length about my love/hate relationship with velocity and focusing on developer enablement, and my opinion has largely been unchanged for about a decade. The obsession with this (relatively) arbitrary number skews the value we are creating when it becomes your only goal:
But there is still a struggle in managing a team with the factors I laid out: a lot of it is subjective. There is no numerical value for morale, there are ways to exploit or game expectation setting the same as timelines, and other ways are not as convenient as the black and white of a velocity number.
Knowing velocity, the team can compute (or revise) an estimate of how long the project will take to complete, based on the estimates associated with remaining user stories and assuming that velocity over the remaining iterations will remain approximately the same. This is generally an accurate prediction, even though rarely a precise one.
I am wanting to create a column in my project workflow that will show how many story points I have remaining for the sprint or release. I have a snap shot of the sheet that shows Checkbox column for Started and Done, a Status column based on checkbox on or off, Velocity(story points) and remaining velocity. Hidden is the Task column to the left of the started checkbox, notes, assigned to, and dates.
What I have been trying to work out is how to have the total story points in the Velocity for each main task, in this case 12 in light blue show up in the Remaining velocity column at the same row. Then as a subtask is complete, and the checkbox marked done is checked, the remaining velocity column would count down from the total.
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Thanks again for your support. The thing is that each time that I click on the link Failed to execute the [velocity] macro with my personal user (or even with another user, for example Admin), no log entry is recorded in the catalina.out file. As I explained you yesterday, the logtrace is shown always imcomplete/cut; I know perfectly that there are 109 more lines which are not in this trace, but I do not know where are all the lines being written.
Do yo have any idea about what is the log file where all this info is recorded? I grant you that in catalina.out there is no trace of them. Moreover, I tried to attach you an screenshot of the stacktrace, but this forum does not allow me to upload it. Any suggestion about the root cause, any proposal?
The last line of the trace is the following one:
Thanks again for your support. The thing is that each time that I click on the link Failed to execute the [velocity] macro with my personal user (or even with another user, for example Admin), no log entry is recorded in the catalina.out file. As I explained you yesterday, the logtrace is shown always imcomplete/cut; I know perfectly that there are 109 more lines which are not in this trace, but I do not know where is all the lines being written.
The Good: Along with other inputs like team capacity, prior commitments, Velocity helps Development Team decide how many Product Backlog Items they may forecast for current Sprint. Velocity also helps Product Owner to gauge how quickly a team may work through the backlog, because the report tracks the forecast and completed work over several iterations. The Product Owner may revise the forecasted delivery timelines based on the variations in velocity of the Development Team.
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