Mechanics question help

Hey doing a past paper and I don't know how to answer this question:
A stone of mass 0.5kg is released from rest on the surface of the water in a well. The water exerts a constant resistance of 2N.

1. Find the acceleration of the stone

The stone takes 1.5 seconds to reach the bottom of the well.
2. Find the speed with which the stone hits the bottom,
3. The depth of water in the well.

Could someone please explain what to do because I am very lost.

If the water produces a constant force, what does that mean about acceleration?

I don't really know, i've never come across a question like this before.

How is force related to acceleration?
If it's constant, use SUVAT
If it's variable, use integration.

So do i just work it out the same way i would if it wasn't in water?

As long as you account for the 2N force.

So do i just work it out the same way i would if it wasn't in water?

How do you do that?

You have both gravity and water forces acting on the mass. How do they combine?

I don't know i've never been taught about questions envolving water

You have gravity pulling the stone down and another force of 2N resisting motion .... so ...

Honestly I have no idea

What force does gravity exert on the mass?

10N

No, how did you get that?

In our course we are told to take gravity as 10N

The force depends on the mass.
The acceleration g is about 10 m/s^2

Almost every time in mechanics you can simplify it down to something very abstract. The well, the water, the air, the stone, it's all window-dressing. So you have to pick out the bits that actually affect it.
So once you know the acceleration, for the next few questions you're just using the suvat formulae. Depth means displacement, dropped from the surface means u = 0.

I understand the rest of the question i just don't know how to find acceleration. Could you please explain?