static void Main(string[] args)
{
// Two forces _F1 and _F2 act on a 5.00-kg mass.
// If F1 = 20.0 N and F2 = 15.0 N, find the accelerations in
// (a) and (b) of Figure P5.15.
var F1 = new Symbol("F1");
var F2 = new Symbol("F2");
var th1 = new Symbol("th1");
var th2 = new Symbol("th2");
var m = new Symbol("m");
var obj = new Obj()
{
mass = m
};
obj.forces.Add(Point.FromAngle(th1, F1));
obj.forces.Add(Point.FromAngle(th2, F2));
"symbolic:".Disp(); "".Disp();
"acceleration.x:".Disp(); "".Disp();
obj.Acceleration().x.Disp(); "".Disp();
"acceleration.y:".Disp(); "".Disp();
obj.Acceleration().y.Disp(); "".Disp();
"numeric (th2 = 90 deg):".Disp(); "".Disp();
Console.Write("acceleration is ");
Console.Write(
obj.Acceleration().Norm()
.Substitute(th1, 0.0)
.Substitute(F1, 20)
.Substitute(th2, (90).ToRadians())
.Substitute(F2, 15)
.Substitute(m, 5)
.Substitute(Trig.Pi, Math.PI));
Console.Write(" at ");
Console.Write(
obj.Acceleration().ToAngle().ToDegrees()
.Substitute(th1, 0.0)
.Substitute(F1, 20)
.Substitute(th2, (90).ToRadians())
.Substitute(F2, 15)
.Substitute(m, 5)
.Substitute(Trig.Pi, Math.PI));
Console.Write(" degrees"); "".Disp(); "".Disp();
"numeric (th2 = 60 deg):".Disp(); "".Disp();
Console.Write("acceleration is ");
Console.Write(
obj.Acceleration().Norm()
.Substitute(th1, 0.0)
.Substitute(F1, 20)
.Substitute(th2, (60).ToRadians())
.Substitute(F2, 15)
.Substitute(m, 5)
.Substitute(Trig.Pi, Math.PI));
Console.Write(" at ");
Console.Write(
obj.Acceleration().ToAngle().ToDegrees()
.Substitute(th1, 0.0)
.Substitute(F1, 20)
.Substitute(th2, (60).ToRadians())
.Substitute(F2, 15)
.Substitute(m, 5)
.Substitute(Trig.Pi, Math.PI));
Console.Write(" degrees"); Console.WriteLine();
Console.ReadLine();
}
