State whether thrust is a scalar or vector?

State whether pressure is a scalar or vector?

Pressure at free surface of a water lake is P₁, while at a point at depth h below it's free surface is P₂. (a) How are P₁ and P₂ related ? (b) Which is more P₁ or P₂ ?

How does the liquid pressure on a diver change if —

(i) the diver moves to the greater depth, and

(ii) the diver moves horizontally ?