Functions/GenXdev.Helpers.Physics/Get-ImpactVelocityByHeightAndGravity.cs
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// ################################################################################
// Part of PowerShell module : GenXdev.Helpers.Physics // Original cmdlet filename : Get-ImpactVelocityByHeightAndGravity.cs // Original author : René Vaessen / GenXdev // Version : 2.1.2025 // ################################################################################ // Copyright (c) René Vaessen / GenXdev // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // ################################################################################ using System; using System.Management.Automation; namespace GenXdev.Helpers.Physics { /// <summary> /// <para type="synopsis"> /// Calculates impact velocity from height. /// </para> /// /// <para type="description"> /// Uses v = sqrt(2 g h) ignoring air resistance. /// </para> /// /// <para type="description"> /// PARAMETERS /// </para> /// /// <para type="description"> /// -HeightInMeters <double><br/> /// Height in meters.<br/> /// - <b>Mandatory</b>: true<br/> /// - <b>Position</b>: 0<br/> /// </para> /// /// <para type="description"> /// -GravityInMetersPerSecondSquared <double><br/> /// Gravity in m/s². Default 9.81.<br/> /// - <b>Mandatory</b>: false<br/> /// - <b>Position</b>: 1<br/> /// - <b>Default</b>: 9.81<br/> /// </para> /// /// <para type="description"> /// -As <string><br/> /// Output unit for velocity. Default 'm/s'.<br/> /// - <b>Mandatory</b>: false<br/> /// - <b>Position</b>: 2<br/> /// - <b>Default</b>: "m/s"<br/> /// - <b>Allowed values</b>: m/s, km/h, mph, ft/s<br/> /// </para> /// /// <example> /// <para>Get-ImpactVelocityByHeightAndGravity -HeightInMeters 100 -As "km/h"</para> /// <para>Calculates impact velocity for a 100 meter fall and outputs in km/h.</para> /// <code> /// Get-ImpactVelocityByHeightAndGravity -HeightInMeters 100 -As "km/h" /// </code> /// </example> /// /// <example> /// <para>Get-ImpactVelocityByHeightAndGravity 50</para> /// <para>Calculates impact velocity for a 50 meter fall using default units.</para> /// <code> /// Get-ImpactVelocityByHeightAndGravity 50 /// </code> /// </example> /// </summary> [Cmdlet(VerbsCommon.Get, "ImpactVelocityByHeightAndGravity")] [OutputType(typeof(double))] public class GetImpactVelocityByHeightAndGravityCommand : PSGenXdevCmdlet { /// <summary> /// Height in meters /// </summary> [Parameter( Mandatory = true, Position = 0, HelpMessage = "Height in meters")] public double HeightInMeters { get; set; } /// <summary> /// Gravity in m/s² /// </summary> [Parameter( Mandatory = false, Position = 1, HelpMessage = "Gravity in m/s². Default 9.81.")] public double GravityInMetersPerSecondSquared { get; set; } = 9.81; /// <summary> /// Output unit for velocity /// </summary> [Parameter( Mandatory = false, Position = 2, HelpMessage = "Output unit for velocity. Default 'm/s'.")] [ValidateSet("m/s", "km/h", "mph", "ft/s")] public string As { get; set; } = "m/s"; /// <summary> /// Process record - main cmdlet logic /// </summary> protected override void ProcessRecord() { // Calculate impact velocity using v = sqrt(2 g h) double velocity = Math.Sqrt(2 * GravityInMetersPerSecondSquared * HeightInMeters); // Convert velocity to desired unit using GenXdev.Helpers\Convert-PhysicsUnit var script = $"GenXdev.Helpers\\Convert-PhysicsUnit -Value {velocity} -FromUnit 'm/s' -ToUnit '{As}'"; var results = InvokeCommand.InvokeScript(script); // Output the converted velocity value if (results != null && results.Count > 0) { WriteObject(results[0]); } } } } |