Density is a measure of how much mass is concentrated in a given space. Sir Isaac Newton discovered that as an object’s mass increases, the gravitational attraction of that object increases. … Thus, the gravitational attraction on the Moon is much less than it is here on Earth, and a person weighs less on the Moon.
Why do astronauts weigh less on the Moon than they do on Earth quizlet?
Why does an astronaut weigh less on the moon than on Earth? the force of gravity is weaker on the surface of the Moon than on the surface of the Earth.
Why do astronauts weigh less in space?
Earth-orbiting astronauts are weightless for the same reasons that riders of a free-falling amusement park ride or a free-falling elevator are weightless. They are weightless because there is no external contact force pushing or pulling upon their body. In each case, gravity is the only force acting upon their body.
Why is the weight of an object more on Earth than on the moon quizlet?
Why is the weight of an object more on Earth than on the Moon? The gravitational pull of Earth is greater than that of the Moon.
Are astronauts in orbit weightless?
(B) An astronaut orbiting the Earth does feel weightless because there is no ground or normal force to counteract the force of gravity. Thus, the astronaut is falling. However, since the astronaut is also moving forward super fast, he/she continuously falls around the Earth rather than crashing into the Earth.
How do astronauts walk on the moon without gravity?
Astronauts trained for microgravity by walking “sideways.”
Armstrong practiced taking off and landing in the Lunar Landing Training Vehicle in Houston. And, to simulate walking in the moon’s lower-gravity atmosphere, astronauts were suspended sideways by straps and then walked along a tilted wall.
Does everything weigh the same on the moon?
The weight of an object is a force expressed in Newton (N). … Therefore, the mass of an object on the Moon remains the same as its mass on Earth. But its weight gets less because the gravity on the moon is less than on the Earth.
Why is weight of an object more on Earth than on the Moon?
Objects on the Moon weigh less than they do on the Earth because the gravitational field strength is much less. … The weight of an object and its mass are directly proportional. For a given gravitational field strength, the greater the mass of the object, the greater its weight.
Does an object has a greater mass on Earth than it does on the Moon?
The Moon has a smaller mass than the Earth and so the pull of gravity by the moon on an object is smaller than on the earth. The moon has a smaller gravitational field strength. On the Moon, g = 1.6 N/kg. In other words, a 1 kg mass has a weight on the Moon of 1.6 N.
What factors does the weight of an object depend?
An object’s weight depends on its mass (the amount of matter it consists of) and the strength of the gravitational pull.
How do astronauts not float away on the Moon?
The safety tethers keep astronauts from floating away into space. Astronauts also use tethers to keep tools from floating away. … It uses small jet thrusters to let an astronaut move around in space. If an astronaut were to become untethered and float away, SAFER would help him or her fly back to the spacecraft.
Does space have zero gravity?
Some people think that there is no gravity in space. In fact, a small amount of gravity can be found everywhere in space. … Gravity, however, does become weaker with distance. It is possible for a spacecraft to go far enough from Earth that a person inside would feel very little gravity.
Do astronauts feel the speed of ISS?
No. You don’t actually feel speed, you feel acceleration. When the astronauts are inside the ISS, the ISS and everything in it are in free-fall around the planet at the same speed. Nothing is speeding up, slowing down, or changing direction.