Is velocity ever a scalar quantity? • Physics Forums
Dec 27, 2024 · I thought velocity was always a vector quantity, one with both magnitude and direction. When it came to the suvat equations, where v = final velocity, and u = initial velocity, I thought both of …
How Long Does It Take a Person to Reach Terminal Velocity?
Apr 20, 2014 · I want to estimate how long it will take a person (I could specify their dimensions and density :P but maybe just take it as 170 cm tall, 80 kg, etc.) to fall a certain height in the gravitational …
Why Do Objects Only Reach 95% of Their Terminal Velocity?
Jul 18, 2014 · And since drag is proportional to velocity, both force will eventually be equal therefore, the object will not accelerate anymore, hence reaching terminal velocity. So why is it assumed that the …
Change in direction affecting velocity • Physics Forums
Jul 13, 2016 · Changing direction while in motion does affect velocity because velocity is a vector quantity that includes both speed and direction. When an object, such as a car, turns even slightly, …
Minimum Velocity Required for Loop-The-Loop Problem
Jan 7, 2023 · A question regarding the minimum velocity required by a particle to 'do a loop' without falling- Assuming the particle has a velocity v before reaching the loop. Then- KE = mv²/2, at the …
How to find the initial velocity given only angle and distance traveled
Sep 19, 2010 · Homework Statement An object is shot (from a cannon) at an angle of 33 degrees and landed 85 m away. Calculate the magnitude of the initial velocity (Hint:Look at the x direction and …
Why is friction proportional to velocity? • Physics Forums
Jun 18, 2012 · We all know in phenomenological equations we like to add a -\\gamma v effective force term to Newton's equation to include frictional effects with the environment. Why this specific shape? …
Velocity-time graph given. Plot acceleration vs time etc.
Nov 5, 2018 · A velocity-time graph for an object moving along the x-axis is shown in Figure P2.15. (a) Plot a graph of the acceleration versus time. Determine the average acceleration of the object (b) in …
Escape Velocity Question: Why is the final kinetic energy = 0?
Dec 13, 2020 · The escape velocity represents the threshold where an object's initial kinetic energy is sufficient to ensure it remains unbound from the planet. If the object's initial kinetic energy is less …
Addition of Velocities (Velocity Composition) in Special Relativity
May 20, 2024 · The “Addition of Velocities” formula (more correctly, the “Composition of Velocities” formula) in Special Relativity v A C c = v A B c + v B C c 1 + v A B c v B C c is a non-intuitive result …