Here's the breakdown of the forces acting on a raindrop falling at a constant speed:

* Gravity: This force acts downward, pulling the raindrop towards the Earth. It's the primary force responsible for the raindrop's motion.

* Air Resistance (Drag): As the raindrop falls, it encounters air resistance. This force acts upwards, opposing the raindrop's motion.

Constant Speed and Net Force:

Since the raindrop is falling at a constant speed, we know that the net force acting on it is zero. This means the upward force of air resistance perfectly balances the downward force of gravity.

Direction and Magnitude:

* Direction: The net force is zero, meaning it has no direction.

* Magnitude: The net force has a magnitude of zero.

In summary: When a raindrop falls at a constant speed, the forces of gravity and air resistance are equal and opposite, resulting in a zero net force.