moveDown(speed)
If this Body is dynamic then this will move it down by setting its y velocity to the given speed.
The speed is represented in pixels per second. So a value of 100 would move 100 pixels in 1 second (1000ms).
Parameters
| Name | Type | Description | 
|---|---|---|
speed |  number | The speed at which it should move down, in pixels per second.  |  
- Source code: physics/p2/Body.js (Line 815)
 
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