I will show you a method to find a velocity of anything:-
Find average velocity when acceleration is constant.
Set up an equation with position and time instead.
Find the distance between the start and end points.
Calculate the change in time.
Divide the total displacement by the total time.
Solve problems in two dimensions.
Accelerating, because it’s going from standing still to running, so the speed increases
The molecules in gas are farther apart and have more room to bounce around than liquid
