Make it small light, and stylish.
what
gravity
The lift and thrust force makes an airplane go faster.
heat which makes it move faster.
convection
it makes them move faster or vibrate
the smaller they are the less resistance to water and the faster they move.
force of gravity
In warmer water, particles generally have more energy. This makes them move faster, and so spread out faster.
Gravity, until terminal velocity is achieved.
an engine
makes the molecules in the water move faster.