Playing with JavaScript to create a physics test for no reason at all.
The variable ball is accessible in the global scope. You can use it to mess around with its acceleration, velocity, and position.
ball.acc.set.add([1000, -50])
// Acceleration is now [1000, -50]
ball.vel.set.scale(2)
// Velocity has been doubled
ball.dis.set([100, 100])
// Position is [100, 100],
// relative to top-left of viewport