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Asked by to Anna, Iain, Nick on 20 Mar 2014. This question was also asked by .
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Nick Goldman answered on 20 Mar 2014:
Yes, there certainly is. Gravity is caused by the ‘pull’ of objects between one-another, and every object has some gravity. You don’t notice with two small things like 2 tennis balls because gravity isn’t that strong. But the gravity from something huge like Earth is big enough to be very obvious. Mars is also very big — about 10% as big as Earth — and so it generates a fair bit of gravity. On the surface of Mars, there is about 40% as strong gravity as on the surface of Earth.
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Anna Middleton answered on 20 Mar 2014:
Mars isn’t as dense as earth which means it has lower gravity. The effect of this is that you would weigh less on Mars than you do on earth or any other planet in our Solar system. That’s a weird thought!
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Iain Moal answered on 21 Mar 2014:
Yes, Mars has gravity. Actually, everything has gravity, which depends on how much mass it has. People, for instance, are pretty small, so the amount of gravitational force we produce is so small that we don’t notice it. Planets and stars, however, are very big and have a lot of mass, and so have gravitational forces that are big enough to notice. Mars is about ten times smaller than earth, so the gravity of mars is about ten times smaller.
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