7 miles per second
10 miles per second
25 miles per second
60 miles per second
Escape velocity or escape speed is the minimum speed needed for an object to escape from contact with or orbit of a primary body. It is a fundamental concept in physics that plays a crucial role in understanding the dynamics of objects in space. Whether you’re a student learning about celestial bodies or just curious about how spacecraft break free from Earth’s gravitational pull, the escape speed formula is the key to unraveling this mystery.
- Escape speed is the minimum velocity an object must reach to break free from the gravitational influence of a celestial body, such as a planet or a moon. It’s the speed required to escape to infinity, which means the object will never return unless influenced by another gravitational force.
- The escape speed formula is a straightforward equation that calculates the escape velocity required for an object to leave a celestial body. The formula is as follows: Escape Speed (v) = √(2 * G * M / R) Where:
- v is the escape speed.
- G is the gravitational constant.
- M is the mass of the celestial body (e.g., Earth).
- R is the radius of the celestial body (e.g., Earth’s radius).
- Now, let’s break down the components of this formula:
- Gravitational Constant (G): The gravitational constant is a fundamental constant in physics, denoted by ‘G.’ It has a constant value of approximately 6.674 × 10^(-11) m³ kg^(-1) s^(-2). This constant represents the strength of the gravitational force between two objects.
- Mass of the Celestial Body (M): This refers to the mass of the celestial body from which an object is trying to escape. For Earth, this would be the mass of our planet.
- Radius of the Celestial Body (R): The radius of the celestial body is the distance from its center to its surface. For Earth, this is the radius of the Earth.
By plugging in the values of ‘G,’ ‘M,’ and ‘R’ for a specific celestial body into the escape speed formula, you can calculate the exact velocity required for an object to escape from that body’s gravitational pull.
- Earth’s escape velocity is 11.2 km (6.96 miles) per second, if air resistance was ignored at the Earth’s surface. So, if a free body travels at this speed, it can break away from Earth’s gravity into outer space.
- Atmospheric composition is related to escape velocity. For example, Earth loses gases like hydrogen and helium because it isn’t large enough to hold onto them. But Jupiter, Saturn and Uranus hold on tight to these gases because they are much bigger in size. In fact, their atmospheres are mostly these gases.
- Earth’s escape velocity is the speed that an object needs to be traveling in order to break free from Earth’s gravitational pull. If an object has a lower escape velocity, then the object will not be able to break free from Earth’s gravitational pull.
If you are interested in preparing for the CSS MPT and other FPSC, SPSC, and PPSC General Recruitment Tests with us, get in touch with us.
Related MCQs
- Cyclones? (CSS 2018 General Science & Ability Paper)
- Experience Coriolis effects that deflect air to the right in the Southern Hemisphere
- Are associated with Super geostrophic winds
- Are typically regions of fair weather?
- Are associated with Low pressure systems
Submitted by: CSS Exam Desk Team
- 2019 Indo-Pacific Chiefs Of Defiance (CHOD) Conference 2019 Held In? (CSS 2020 Current Affairs Paper)
- Tokyo
- Beijing
- New Delhi
- Bangkok
Submitted by: CSS Exam Desk Team
- The protein molecule is made of? (CSS 2024 General Science & Ability Paper)
- Alkaloids
- Nucleosides
- Short range chain of amino acids
- Long range chain of amino acids
Submitted by: CSS Exam Desk Team
- Man belongs to the family? (CSS 2011 General Science & Ability Paper)
- Felidae
- Hominidae
- Mammalia
- Primataceae
Submitted by: CSS Exam Desk Team
- The great book “A-itqan fi Uloom Al-Quran” was Composed by? (CSS 2022 Islamic Studies Paper)
- Muhammad Ali-al-Babuni
- Muhammad Hassan Zahid
- Imam Ghazali
- Jalal-ud-din Suyuti
Submitted by: CSS Exam Desk Team
- Musharraf took over in 1999 as? (CSS 2019 Pakistan Affairs Paper)
- President
- Chief Executive
- Law Administrator
- None of these
Submitted by: CSS Exam Desk Team
- An \'Enzyme\' is a chemical substance that is found in living creatures. It is? (CSS 2023 Special General Science & Ability Paper)
- Virus
- Protein
- Bacteria
- All of these
Submitted by: CSS Exam Desk Team
- The SYNONYM of the word \"TOUCHSTONE\" is? (CSS 1989 English Precis & Composition Paper)
- Impetus
- Goliath
- Criterion
- Capricious
Submitted by: CSS Exam Desk Team
- The SYNONYM of the word \"MENAGE\" is? (CSS 2011 English Precis & Composition Paper)
- Household
- Coordination
- Golden years
- Marriage vow
Submitted by: CSS Exam Desk Team
- The SYNONYM of the word \"NICETY\" is? (CSS 2017 English Precis & Composition Paper)
- Roundness
- Precision
- Carelessness
- Inexactitude
Submitted by: CSS Exam Desk Team
- Rotation in which earth rotates in the form of?
- West to East
- East to West
- North to South
- South to North
Submitted by: CSS Exam Desk Team
- What was the old name of Sri Lanka? (CSS 2016 Current Affairs Paper)
- Serendib
- Ceylon
- Lankadeepa
- All of the above
Submitted by: CSS Exam Desk Team
- Hazrat Muhammad (صلی اللہ علیہ وسلم) did not remarry in The lifetime of Hazrat Khadija(رضی اللہ عنہا).After her Death he (صلی اللہ علیہ وسلم) married? (CSS 2023 Islamic Studies Paper)
- Hazrat Ayesha(رضی اللہ عنہا)
- Hazrat Sawda(رضی اللہ عنہا)
- Hazrat Safiyya(رضی اللہ عنہا)
- None of these
Submitted by: CSS Exam Desk Team
- International Day for the Elimination of Violence against Women is observed annually on? (CSS 2013 Current Affairs Paper)
- 25th December
- 23rd November
- 25th November
- None of these
Submitted by: CSS Exam Desk Team
- The largest Agency in the Federally Administered Tribal Areas (FATA)? (CSS 2015 Pakistan Affairs Paper)
- Ghalanai
- Khyber Agency
- South Waziristan
- None of these
Submitted by: CSS Exam Desk Team
- “Shudhi” movement was started by? (CSS 2013 Pakistan Affairs Paper)
- Jawahar Lal Nehru
- Tilak
- Gandhi
- None of these
Submitted by: CSS Exam Desk Team
- \'In the Line of Fire\' is a book, written by? (PPSC Tehsildar General Knowledge Test, December 15, 2024)
- Ayesha Jalal
- Mohsin Hamid
- Pervez Musharraf
- Mohammed Hanif
Submitted by: CSS Exam Desk Team
- A Verse Of Holy Quran Indicates The Name of? (CSS 2018 Islamic Studies Paper)
- Hazrat Muaaz(رضی اللّٰہ عنہ)
- Hazrat Bilal(رضی اللّٰہ عنہ)
- Hazrat Saad(رضی اللّٰہ عنہ)
- Hazrat Zaid(رضی اللّٰہ عنہ)
Submitted by: CSS Exam Desk Team
- Who served the Prophet Muhammad (صلی اللہ علیہ وسلم) for ten years as his personal attendant? (CSS 2021 Islamic Studies Paper)
- Hazrat Hamzah(رضی اللّٰہ عنہ)
- Hazrat Zaid bin Hari(رضی اللّٰہ عنہ)
- Hazrat Anas bin Malik(رضی اللّٰہ عنہ)
- Hazrat Khalid ibn al-Walid(رضی اللّٰہ عنہ)
Submitted by: CSS Exam Desk Team
- Which Prophet is titled as Safiullah? (CSS 2023 Special Islamic Studies Paper)
- Hazrat Adam (عليه السلام )
- Hazrat Dawood (عليه السلام )
- Hazrat Yahya (عليه السلام )
- Hazrat Younus (عليه السلام )
Submitted by: CSS Exam Desk Team
- Holodomor that convulsed the Soviet republic of Ukraine from 1932 to 1933 is called? (CSS 2023 Current Affairs Paper)
- Natural famine
- Man-made famine
- Famine which causes death
- None of these given options
Submitted by: CSS Exam Desk Team
- The study of the relationship between environment and organism is? (CCE 2023 Screening Test, December 1, 2024)
- Gerontology
- Ecology
- Lithography
- Entomology
Submitted by: CSS Exam Desk Team
- according to Nabi Akram ( (صلی اللہ علیہ وسلم) the most favourite place of allah is? (CSS 2012 Islamic Studies Paper)
- eidgah
- bazar
- mosque
- home
Submitted by: CSS Exam Desk Team
- The plan of Sir Stafford Cripps envisaged that After the Second World War? (CSS 2018 Pakistan Affairs Paper)
- India should be granted complete Independence
- India should be partitioned into two before Granting independence
- India should be made a republic
- India should be given dominion status
Submitted by: CSS Exam Desk Team
- If an igneous rock cuts across a sedimentary rock, we know that the igneous rock is? (CSS 2014 General Science & Ability Paper)
- Older than the sedimentary rock
- Younger than the sedimentary rock
- The same age as the sedimentary rock
- A minimum of 1.2 million years old
Submitted by: CSS Exam Desk Team