Answer this question?

Jump to Last Post 1-1 of 1 discussions (4 posts)
  1. vydyulashashi profile image59
    vydyulashashiposted 7 years ago

    If Ve1 and Ve2 are the velocities of a stone of mass 100 grams and ball weighing 200 grams which are projected up.
    If they escape into outer space what is the ratio of their escape velocities?

    1. RDSPhD profile image60
      RDSPhDposted 7 years agoin reply to this

      First of all there are 4 escape velocities, one to just get into earth's orbit (it's around 7.9 km/s)
      the second to get out of earth's gravitational field (11.2 km/s) (because floating around earth can be a bit boring wink) the third to escape the sun system (42.1 km/s) and last but not least to get out of our galaxy, the milky way (320 km/s).

      while the mass of the bodies sent into space makes no difference in these velocities (e.g. the velocity needed is the same for a 1g or a 1000 tons rock) it does make a difference in energy needed to accelerate a body to this speed of course (that's why it still matters how heavy e.g. a rocket sent into space is). But their escape velocities stay the same!

      (p.s. the only mass that matters in the calculation of escape velocities, are the masses of the celestial bodies whose gravitational force one has to escape, that's why VE3 is much higher than VE2 (since ME3 is the mass of the Sun while ME2 is the mass of our small planet Earth wink)
      P.p.s. the real values for these velocities VEopt. are a lot smaller if you make use of the rotation force of let's say earth or the sun! VE4opt then reduces from 320 to "only" 100 km/s making our escape from the milky way at least in far future a bit more probable wink)

      1. vydyulashashi profile image59
        vydyulashashiposted 7 years agoin reply to this

        Absolutely rite. 1:1

        1. RDSPhD profile image60
          RDSPhDposted 7 years agoin reply to this

          Oh this was a test ? then I'm sorry to have spoiled it (I have an unfair advantage wink) I thought you didn't know it yourself and wanted someone to explain wink anyhow, a great question to ask your friends wink It's as good as: would you rather spend a day on Venus eating nothing but bread and water or a year eating everything you want wink


This website uses cookies

As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

Show Details
HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
LoginThis is necessary to sign in to the HubPages Service.
Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
AkismetThis is used to detect comment spam. (Privacy Policy)
HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
MavenThis supports the Maven widget and search functionality. (Privacy Policy)
Google AdSenseThis is an ad network. (Privacy Policy)
Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
Index ExchangeThis is an ad network. (Privacy Policy)
SovrnThis is an ad network. (Privacy Policy)
Facebook AdsThis is an ad network. (Privacy Policy)
Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
AppNexusThis is an ad network. (Privacy Policy)
OpenxThis is an ad network. (Privacy Policy)
Rubicon ProjectThis is an ad network. (Privacy Policy)
TripleLiftThis is an ad network. (Privacy Policy)
Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)