The sailboat is about 0.83m/sec (rounded to the nearest tenth).
To find speed, you would calculate distance over time.
100 meters/120 seconds = 0.83 meters per second
Work is a quantity that measures the effects of a force acting over a distance.
If the object has a lower density it will float and it if it has a higher density it will sink, different liquids may also be heavier or lighter causing a different outcome.
The suns gravity pulls on the planets and keeps them in place. Its gravitational pull puts them in orbit around the sun