That's simple obviously it is mercuary cause it closer to the sun than other planets
No, gravity doesn't cause the Earth's rotation.
jupiter because its fast
They are used to seal motors or machines and rotatin pump shaft or hydraulic cylinder pistons.
Mercury because of its fast orbit.
Mars
Mars
2100km
Mercury is the fastest.
Jupiter
Mercury .
The rotational period, or how fast a planet spins on its axis, determines the length of a day on that planet. A faster spin results in shorter days, while a slower spin leads to longer days.
The planet always moved very fast. But it's fastest velocity would be attained at it's nearest approach to the sun.