Physics Object Base

Physics Object Base

Source: PhysicsObjectBase.cs

namespace: UniversityPhysics.PhysicsObjects

---

• Properties
• Constructors
• Methods
  • Accelerate
  • Move
  • AddForce_Translational
  • RotationPeriod
• Overrides
  • ToString

Properties

double Mass { get; set; }
double Charge { get; set; }
double TotalEnergy { get; }
Vector Position { get; set; }
Vector Velocity { get; set; }
Vector Acceleration { get; set; }
Vector Rotation { get; set; }
Vector RotationalAceleration { get; set; }
Vector Momentum { get; }
Vector KineticEnergy { get; }

Constructors

PhysicsBaseObject is an abstract class.

Methods

Accelerate()

void Accelerate(Vector acceleration, double timeDelta)

Updates velocity via suvat equation v = u + at

returns: void

Particle p = new Particle(mass: 1)
{
    Velocity = new Vector(1, 1, 1)
};

Vector acceleration = new Vector(1, 0, 0);

//Accelerate for 5 seconds
p.Accelerate(acceleration, timeDelta: 5);

// ===> p.Velocity = Vector(6, 1, 1)

Move()

void Move(double timeDelta)

Updates Position via suvat equation s = ut + 1/2 at^2

If the Acceleration property of the object is non-zero, this will be taken into account

returns: void

Particle p = new Particle(mass: 1)
{
    Position = new Vector(0, 0, 0),
    Velocity = new Vector(1, 1, 1),
    Acceleration = new Vector(1, 0, 0)
};

//Move for 5 seconds
p.Move(timeDelta: 5);

// ===> p.Position = Vector(17.5, 5, 5)

AddForce_Translational()

void AddForce_Translational(Vector force)

Applies a constant external force to the object.

This results in an update of the Acceleration property, via F=ma.

returns: void

Particle p = new Particle(mass: 10)
{
    Acceleration = new Vector(1,1,1)
};

Vector externalForce = new Vector(5, 5, 5);

//Apply constant force
p.AddForce_Translational(externalForce);

// ===> p.Acceleration = Vector(1.5, 1.5, 1.5)

RotationPeriod()

void RotationPeriod(Axis_Cartesian axis, TimeMeasure timeMeasure = TimeMeasure.Second)

Gives the time to complete one full rotation about the given axis.

Returns a time value in the desired format, as specified by the timeMeasure parameter

returns: double

GravitationalBody Earth = BasicAstrophysics.Earth;

//get period in hours
double period = Earth.RotationPeriod(Axis_Cartesian.Z, TimeMeasure.Hour);

// ===> period = 24

Overrides

ToString()

Returns a string representation of the object

returns: string

Particle p = new Particle(mass: 12)
{
    Acceleration = new Vector(1, 2, 3),
    Velocity = new Vector(0, 0, 4),
    Charge = -3,
};

string s = p.ToString();

// s = 
// Mass ---------- 12 ( kg )
// Position ---------- X: 0, Y: 0, Z: 0
// Velocity ---------- X: 0, Y: 0, Z: 4 ( m/s )
// Momentum ---------- X: 0, Y: 0, Z: 48 ( kg m/s )
// Acceleration ---------- X: 1, Y: 2, Z: 3 ( m/s^2 )
// Charge ---------- -3 ( As )
// Kinetic Energy ---------- X: 0, Y: 0, Z: 96 ( J )
// Total Kinetic Energy ---------- 96 ( J )