- Ocean tides are caused by the gravity of the moon.
- Mars is smaller and has less mass than Earth. As a result it has less gravity. If you weigh 100 pounds on Earth, you would weigh 38 pounds on Mars.
- The standard gravity from Earth is 1 g force. When riding a roller coaster you may feel a lot more g forces at times. Maybe as much as 4 or 5 g’s. Fighter pilots or astronauts may feel even more.
- At some point when falling, the friction from the air will equal the force of gravity and the object will be at a constant speed. This is called the terminal velocity. For a sky diver this speed is around 100 miles per hour.
- Pluto may no longer be a planet, but it’s still a good bet for lightening up. A 150-pound (68 kilogram) person would weigh no more than 10 pounds (4.5 kg) on the dwarf planet.
- The planet with the most crushing gravity is Jupiter, where the same person would weigh more than 354 pounds (160.5 kg).
- Some bacteria become nastier in space. Sciences found that salmonella, the bacteria that commonly causes food poisoning, becomes three times more virulent in microgravity.