Started by WAS, October 29, 2018, 05:03:55 PM
Quote from: Matt on November 02, 2018, 07:22:12 AMSorry if I sound argumentative - I just like to correct misunderstandings of how things work if it's a subject I'm interested in. But I should stop now unless you want to learn more.
Quote from: WASasquatch on November 02, 2018, 07:20:35 AMQuote from: Matt on November 02, 2018, 07:12:54 AMWould you like to know why mass doesn't matter here? Or shoud we wrap up the conversation?Sure, though I imagine it's just the size of the mass in relation to the absolute massive mass (ha pun) of Earth.
Quote from: Matt on November 02, 2018, 07:12:54 AMWould you like to know why mass doesn't matter here? Or shoud we wrap up the conversation?
Quotesparks debate
QuoteIn the absence of atmosphere, feathers fall at the same speed as cars.
Quote from: Tangled-Universe on November 02, 2018, 07:30:47 AMIt seems WAS is classically mixing up mass and weight...
Quote from: Matt on November 02, 2018, 07:34:32 AMQuote from: WASasquatch on November 02, 2018, 07:20:35 AMQuote from: Matt on November 02, 2018, 07:12:54 AMWould you like to know why mass doesn't matter here? Or shoud we wrap up the conversation?Sure, though I imagine it's just the size of the mass in relation to the absolute massive mass (ha pun) of Earth.Yes. The force of gravity is proportional to the mass of the earth plus the mass of the other object. however, when the mass the object is very small compared to the earth (which is true for both a feather and a spaceship), we just do the calculations for the movement of the feather or spaceship, and assume the earth stays in one place. Or in other words, whether its a feather or a spaceship, the total mass is essentially just the mass of the earth, so the calculations are the same for both objects. EDIT: I got this wrong, sorry!Another way to look at it is this: The force of gravity pulling on a spaceship is much larger than the force on the feather, because the force is proportional to the mass. But the acceleration on the feather is the same as that on the spaceship because acceleration = force / mass. So the mass cancels out.[/quoteThe second part is a good anaology -- the particles. By that logic makes me wonder though, is there really a terminal between the moon and Earth or other objects? And is it big enough to float an item? ]
Quote from: WASasquatch on November 02, 2018, 02:10:49 PMQuote from: Tangled-Universe on November 02, 2018, 07:30:47 AMIt seems WAS is classically mixing up mass and weight... I don't think so. Weight is a product of gravity from mass. Which is why there is infuence from massive masses.
Quote from: Tangled-Universe on November 02, 2018, 05:58:47 PMQuote from: WASasquatch on November 02, 2018, 02:10:49 PMQuote from: Tangled-Universe on November 02, 2018, 07:30:47 AMIt seems WAS is classically mixing up mass and weight... I don't think so. Weight is a product of gravity from mass. Which is why there is infuence from massive masses. Ehm... No.In the context of this discussion you are mixing it up.