Why Do Glass Plates with Water Not Separate Under Weight but Slide Easily?

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Himal kharel
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1. I took two glass plates with a thin film of water trapped in it. One of plates had hook in it. Weights were hung in it. I found that these plates didn't separate until weights of about 2-3 kg was applied.
2.But if slided, it moved easily.
I can explain observation no. 2. It is because the liquid film reduces friction.
Can anyone explain observation no. 1?
 
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The first case is due to surface tension.a situation which is caused due to the intermolecular forces such as adhesive and cohesive forces.It is responsible for holding the water or any other.another example is the capillary action