The force of gravity on Jupiter is 81.3 feet per second squared, or 2.528 grams. This means that a person who weighs 150 pounds on Earth would weigh 379.2 pounds on Jupiter.
Jupiter's gravity is such that it keeps up to 67 moons in orbit around it. Some of these moons are quite large, with Ganymede being larger than the planet Mercury.
Jupiter has a ring system that is possibly made of the dust ejected by two of its moons and held in rings by the planet's gravity. In 2007, the space vessel New Horizons used the gravity of Jupiter to give it an extra boost on its way to Pluto.