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--  Function......... : updateGravity
--  Author........... : 
--  Description...... : 
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function Car.updateGravity ( )
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    local force = math.min ( 40, dynamics.getLinearSpeed ( this.getObject ( ) ) ) * 250
    
    dynamics.addConstantForce ( this.getObject ( ), 0, -force, 0, object.kGlobalSpace )
	
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end
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