Also called the law of inertia, this is the most important thing to realize about motion.
Log in varunkaarthik 8 years agoPosted 8 years ago. Direct link to varunkaarthik's post “while watching the astron...” while watching the astronauts eating in the ISS, it got me thinking... does gravity affect blood circulation? ? i guess food has no problem in digesting because we have peristalitic movements in the esophagus to aid the movement of food. On the other hand the blood travelling through the veins and arteries are powered or made to move with the help of the heart, so does 0 - gravity affect the circulatory system? and therefore strain the heart?? • (37 votes) Archisman 2 years agoPosted 2 years ago. Direct link to Archisman's post “Though I'm 6 years late, ...” Though I'm 6 years late, this article from NASA may help: https://www.nasa.gov/vision/earth/livingthings/arterial_remodel.html. (19 votes) Adarsh 8 years agoPosted 8 years ago. Direct link to Adarsh's post “3rd Example : I get why t...” 3rd Example : I get why the probe follows the straight movement but why it went diagonal is still not clear to me. Can someone elaborate that? Thanks for the help. • (16 votes) John 7 years agoPosted 7 years ago. Direct link to John's post “Because of the thrust to ...” Because of the thrust to the right, the probe would move to the right, but also forward because it was moving forward. The forces combine, and the probe goes diagonal. Hope this helps.😉 angelfromabove410 9 years agoPosted 9 years ago. Direct link to angelfromabove410's post “how to the astronauts eat...” how to the astronauts eat in mid air there is no gravitational force pulling them down doesn't that hurt their bodies when they come down ? • (9 votes) Teacher Mackenzie (UK) 9 years agoPosted 9 years ago. Direct link to Teacher Mackenzie (UK)'s post “great question. When they...” great question. When they swallow the food, the body pulls it down into the stomach. Its a special movement called 'peristalsis' (looks like a Caterpillar walking :-) and it pushes the food along the digestive system in a wave-like motion. (22 votes) Abderrahmane Taouil 9 years agoPosted 9 years ago. Direct link to Abderrahmane Taouil's post “is dark matter considered...” is dark matter considered as an external force?? • (5 votes) tharaisapprentice 4 years agoPosted 4 years ago. Direct link to tharaisapprentice's post “I honestly don't know the...” I honestly don't know the answer to that. I would assume the answer is "yes", however, if you look at the universe as a singular body, dark matter and white holes could both be considered internal forces. This shows how suggestive internal and external forces can be. (7 votes) sumitdongardiye035 7 years agoPosted 7 years ago. Direct link to sumitdongardiye035's post “Sir,What will happen if w...” Sir,What will happen if we are in a lift and the cable of the lift breaks down. • (3 votes) Andrew M 7 years agoPosted 7 years ago. Direct link to Andrew M's post “You will fall.” You will fall. (13 votes) Ammar Hummieda 9 years agoPosted 9 years ago. Direct link to Ammar Hummieda's post “In free fall, when an obj...” In free fall, when an object reaches terminal velocity, why does the force of drag (air resistance) become equal to the weight ? Why doesn't it become greater ? practically, this would be a silly question, but i want to know the theory behind it. Thanks a lot, I love your work and would love to one day contribute to this website as one if its own. • (5 votes) Andrew M 9 years agoPosted 9 years ago. Direct link to Andrew M's post “Drag, like friction, is a...” Drag, like friction, is a reaction force. It can't be greater than the force that it is a reaction to. If it could, objects would reach terminal velocity and then start slowing down. But if they slow down, the drag force would decrease, so then they would speed up, and then slow down, and then speed up.... (4 votes) ❗〽〽ØR৳αL__G@MER 3 years agoPosted 3 years ago. Direct link to ❗〽〽ØR৳αL__G@MER's post “Is there any time interva...” Is there any time interval between when the force is applied and when an opposite force is given? • (3 votes) Charles LaCour 3 years agoPosted 3 years ago. Direct link to Charles LaCour's post “No, there is no lag betwe...” No, there is no lag between a force being applied and the reaction force. Let's consider what is happening when you push on an object. As your hand get close to the object the electrons in the outer shells of the atoms and molecules of your hand and the object start to interact. This interaction is the force on the object and your hand, you can't separate the force from the reaction force, they are all part of the same interaction. (4 votes) tenzingyaltsen15 6 years agoPosted 6 years ago. Direct link to tenzingyaltsen15's post “for the third question, w...” for the third question, while it is moving right and the rocket make short burst of force, it is moving equally in both the horizontal and vertical direction. So if things move equally in both the components, does it mean that we take the resultant force as the final direction? • (4 votes) Wejdan Almaoudi 7 years agoPosted 7 years ago. Direct link to Wejdan Almaoudi's post “i didnt understand what i...” i didnt understand what is inertia ? • (2 votes) Mark Zwald 7 years agoPosted 7 years ago. Direct link to Mark Zwald's post “Inertia is property of ma...” Inertia is property of mass. That property is maintaining momentum unless a force acts on it. (4 votes) Anthony a year agoPosted a year ago. Direct link to Anthony's post “Example 2: how the answer...” Example 2: how the answer is b, not a. The elevator is moving upward at a constant velocity, and the magnitude of the upward force(Fc) is greater than the downward force(Fg). • (3 votes) Charles LaCour a year agoPosted a year ago. Direct link to Charles LaCour's post “If an object is moving at...” If an object is moving at a constant velocity it is not accelerating so there is no net force. (3 votes)Want to join the conversation?
I dont know if it hurts them when they land, but I guess they will feel various pains as they come back down to Earth, depending on how long they were up there. It would be an interesting quesiton to ask them.