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2. Equations for a falling body - Wikipedia

   en.wikipedia.org/wiki/Equations_for_a_falling_body

   Based on wind resistance, for example, the terminal velocity of a skydiver in a belly-to-earth (i.e., face down) free-fall position is about 195 km/h (122 mph or 54 m/s). [3] This velocity is the asymptotic limiting value of the acceleration process, because the effective forces on the body balance each other more and more closely as the ...

3. Speed - Wikipedia

   en.wikipedia.org/wiki/Speed

   Speed is the magnitude of velocity (a vector), which indicates additionally the direction of motion. Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second (m/s), but the most common unit of speed in everyday usage is the kilometre per hour (km/h) or, in the US and the UK, miles per hour (mph).

4. Neelakantha Bhanu Prakash - Wikipedia

   en.wikipedia.org/wiki/Neelakantha_Bhanu_Prakash

   Neelakantha Bhanu Prakash, a mathematics graduate has bagged many gold medals and has world records for fast arithmetic calculations. He has also won the International Speed Math Champion '13 and National Speed Math Champion '11 & '12, and Math Genius Award in 2015.

5. Trachtenberg system - Wikipedia

   en.wikipedia.org/wiki/Trachtenberg_system

   The Trachtenberg Speed System of Basic Mathematics by Jakow Trachtenberg, A. Cutler (Translator), R. McShane (Translator), was published by Doubleday and Company, Inc. Garden City, New York in 1960. [1] The book contains specific algebraic explanations for each of the above operations. Most of the information in this article is from the ...

6. Brachistochrone curve - Wikipedia

   en.wikipedia.org/wiki/Brachistochrone_curve

   The curve of fastest descent is not a straight or polygonal line (blue) but a cycloid (red).. In physics and mathematics, a brachistochrone curve (from Ancient Greek βράχιστος χρόνος (brákhistos khrónos) 'shortest time'), [1] or curve of fastest descent, is the one lying on the plane between a point A and a lower point B, where B is not directly below A, on which a bead slides ...

7. Ant on a rubber rope - Wikipedia

   en.wikipedia.org/wiki/Ant_on_a_rubber_rope

   A key observation is that the speed of the ant at a given time > is its speed relative to the rope, i.e. , plus the speed of the rope at the point where the ant is. The target-point moves with speed v {\displaystyle v} , so at time t {\displaystyle t} it is at x = c + v t {\displaystyle x=c+vt} .