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Monthly Archives: February 2026
Choice log no. 1770250523 – Escape Velocity
Escape velocity is the minimum speed an object needs to break free from a celestial body’s gravity without further propulsion, calculated as Ve = √2GM/r , where G is the gravitational constant, M is the body’s mass, and r is the distance from its center. For Earth, it’s about 11.2 km/s (25,000 mph), while the Moon’s is lower (around 2.4 km/s) due to its smaller mass, and larger bodies like Jupiter have much higher escape velocities.
How it works
- Concept: It’s the speed where an object’s kinetic energy equals the gravitational potential energy, allowing it to travel infinitely far away.
- Dependence: It depends on the mass (M) and radius (r) of the celestial body, not the mass of the escaping object.
- Direction: It’s a scalar, meaning the direction doesn’t have to be straight up, but launching from the equator towards the east is easier due to Earth’s rotation.
Examples
- Earth: ~11.2 km/s (25,000 mph).
- Moon: ~2.4 km/s (1.5 miles/second).
- Mars: ~5 km/s (5,000 m/s).
- Jupiter: Much higher than Earth’s due to its immense mass.
Calculation Formula
- Ve = √2GM/r
- G: Gravitational constant (6.674×10-11 N • m2/kg2)
- M: Mass of the planet/body (in kg)
- r: Radius of the planet/body (in meters)
The above information was provided by Gemini.
es·cape ve·loc·i·ty
/əˈskāp vəˌläsədē/
noun: escape velocity
plural noun: escape velocities
the lowest velocity which a body must have in order to escape the gravitational attraction of a particular planet or other object.
Choice log no. 1770145198 – Epiphany
I realized if I ask this question, that my day actually becomes more productive.
Knowing what I know from yesterday, what would I do today? The first thought that enters my mind, I stop and concentrate on that one thought. More will come after the first thought. I have to stop after the first thought! Else, I start to think of the other thoughts and not act.
For the last two days, my first thought has been to complete three chapters of my Security+ training.
When I complete what I set out to do, I feel real good. I think I am getting addicted to this…
I still have to be present throughout the day, as distraction’s (social media, watch just that one YouTube video to relax, or just one show) pull is very strong. When I start to notice that I cannot focus and I am getting distracted, I step outside and take a five-minute escape (no electronics). Smell the air and admire what is in front of me. Doing this helps me calibrate my thinking and get back to being focused of what I set to complete. Sometimes, I have to take a ten-minute walk to really clear my mind from the pull of distraction.
Choice log no. 1770077047 – Keeping On
Two days in a row in studying for the Security+ (>2hrs). I feel confident that I will hit the set date for the exam!