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+// Chapter 11 example 11
+//------------------------------------------------------------------------------
+clc;
+clear;
+// Given data
+G       = 6.67*10^-11;      // Gravitational constant
+M       = 5.98*10^24;       // mass of the earth in kg
+Re      = 6370*10^3;        // radius of earth in m
+
+// Calculations
+u       = G*M
+Vesc    = sqrt(2*u/Re);
+Ves     = Vesc/1000;    // escape velocity in km/s
+
+// Output
+mprintf('Escape velocity = %3.1f km/s',Ves);
+//------------------------------------------------------------------------------