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We know that the first man to walk on moon was Neil Armstrong. it is said that there is no force of gravity on moon. then how did Neil Armstrong moved a few steps on moon?
Who says there is no gravity in moon?
The acceleration due to gravity on moon is 1/6 that on earth.
I feel that you are confused by the concept of weightlessness in satellites.
On moon, it has its own gravity which is one sixth that on earth.
A spaceship is launched and starts moving directly towards the Moon. At what distance from the earth will the pull of the Moon on the spaceship exceed the pll of the Earth? Ignore the effect of the sun in this calculation