Set the angle of the body.
The angle is measured in radians. If you need to transform it from degrees, use math.rad.
A value of 0 radians will mean "looking to the right". Although radians increase counter-clockwise, the y axis points down so it becomes clockwise from our point of view.
It is possible to cause a collision with another body by changing its angle.
Body:setAngle( angle )
number angle
Nothing.