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June 2018 Update

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Ingy döt Net 2018-06-22 20:57:24 +00:00
parent ba8067c3b7
commit 22f33d4004
5278 changed files with 84726 additions and 14379 deletions
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10
Task/Animate-a-pendulum/JavaScript/animate-a-pendulum-2.js
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@ -17,9 +17,9 @@
in_angle.value = 0;
var cx = 150, cy = 50;
var radius = 100; // cm
var g = 981; // cm/s^2
var g = 9.81; // m/s^2
var angle = 0; // radians
var vel = 0; // cm/s
var vel = 0; // m/s
var dx = 0.02; // s
var acc, vel, penx, peny;
var timerFunction = null;
@ -33,9 +33,9 @@
if(!timerFunction) timerFunction = setInterval(swing, dx * 1000);
}
function swing(){
acc = g * Math.cos(angle) * dx;
vel += acc * dx;
angle += vel * dx;
acc = g * Math.cos(angle);
vel += acc * dx;//Convert m/s/s to m/s
angle += vel/(radius/100) * dx; //convert m/s into rad/s and then into rad
setPenPos();
}
function setPenPos(){