The gravitational force of Mars is 38 percent of Earth's gravity. This low gravity is due to the fact that Mars only possesses 11 percent of the Earth's mass and 15 percent of the Earth's volume. The planet's significantly lower mass and size reduces the gravity it exerts on objects.
The Martian atmosphere is also much lower compared to Earth. The pressure that its atmosphere generates on the planet surface is approximately 7.5 millibars. By comparison, the Earth's atmosphere exerts 1,000 millibars of pressure. However, a day on Mars is very similar in length to an Earth day, with a Martian day being approximately 24 hours and 37 minutes.Learn More
Mars is the second smallest planet in the solar system, with a diameter of just over 4,212 miles and a circumference of 13,256 miles. Its diameter is about 53 percent that of the Earth. Among the major planets, only Mercury is smaller.Full Answer >
The surface gravity of Neptune is 36.6 feet per second squared, or 11.5 meters per second squared. A person weighing 100 pounds on the Earth would weigh about 114 pounds on Neptune.Full Answer >
The surface gravity on Mercury is 3.7 meters per second squared, which is 38 percent of the surface gravity on Earth. Surface gravity is typically measured in acceleration units.Full Answer >
The gravity on Venus equals 8.87 m/s2. With a mass of 4.87 x 10^24 kg, the planet has almost as much mass as the Earth, which is why Venus' gravity is roughly the same as Earth's gravity of 9.81 m/s2.Full Answer >