How can I make this function apply water drag?

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#1

Heya! So, I’ve been working on a water physics engine, I am now trying to make drag in the water to slow the player down when they aren’t holding down an input, I tried to make the drag force proportional to the player’s velocity using the drag formula. I have used the drag formula to calculate the drag that should be applied to the player., but trying to apply this force is the issue, as a vector3 is needed. Making this unit a vector3 causes the player to fling infinitely in the other direction.

Code:

swimTrigger.Event:Connect(function(inWater)
	if inWater == true then
		connection = RS.Heartbeat:Connect(function()
			task.wait()
			local hrpVel =  hrp.AssemblyLinearVelocity
			local dragForce = (.5*hrpVel.Magnitude^2*waterDragCoefficent*.5)
			local appliedDrag = Instance.new("VectorForce")
			appliedDrag.RelativeTo = Enum.ActuatorRelativeTo.World
			appliedDrag.Force = --Missing applied force
			appliedDrag.Name = ("DragForce")
			appliedDrag.Attachment0 = hrp:FindFirstChildWhichIsA("Attachment")
			appliedDrag.Parent = hrp
		end)
	elseif connection then connection:Disconnect() end
end)
#2

You could use DeltaTime to apply drag