Description
For positive gravity return apexTime=verticalVelocity/gravity and timeUntilApex=apexTime-currentTime.
A mechanics calculation needs a coordinate frame, sign convention, and consistent force, length, mass, and time units. Vector projections, local balance terms, and ideal motion equations describe particular parts of a physical model. They do not automatically establish all equilibrium conditions or the validity of the model.
For positive gravity return apexTime=verticalVelocity/gravity and timeUntilApex=apexTime-currentTime.
When to use this tool
Use Projectile Trajectory Apex Time Offset when you need this particular projection, balance, frame conversion, or ideal-model component from supplied physical quantities.
How to use the tool and how it works
- Enter verticalVelocity, gravity, currentTime. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read apexTime, timeUntilApex. Use the output convention below.
For positive gravity return apexTime=verticalVelocity/gravity and timeUntilApex=apexTime-currentTime.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| verticalVelocity | Vertical Velocity | Required. Finite number. |
| gravity | Positive gravitational acceleration in the compatible length per time squared unit. | Required. Finite number; strictly above 0. |
| currentTime | Current Time | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| apexTime | Apex Time | Required. Finite number. |
| timeUntilApex | Time Until Apex | Required. Finite number. |
{
"input": {
"verticalVelocity": 19.6,
"gravity": 9.8,
"currentTime": 1
},
"output": {
"apexTime": 2,
"timeUntilApex": 1
}
}Limitations and assumptions
- Velocity and gravity need compatible length and time units, and currentTime uses that time unit from launch. Negative times are allowed; drag, terrain, and launch feasibility are not checked.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Signed zero is exported as zero.
Alternative or Complementary methods
Use a complete force, motion, or energy model when a single contribution is insufficient. Check coordinate frames, idealizations, and dimensional consistency before combining calculated terms.
References
Similar or alternative tools
- Projectile Apex Energy Fraction
Ideal no-drag projectile kinetic-energy fraction at the vertical apex, relative to launch, for nonzero launch speed.
- Wave Phase Time Origin Sign
Phase offset after substituting old time = new time + supplied origin shift.