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.