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Is velocity ever a scalar quantity? - Physics Forums 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 those were vector quantities, e g; v (final velocity) 112km hr North u (initial velocity) 0km hr
Velocity of an Object Dropped from Height: Law Explained an increase in the height from which an object is dropped positively correlates with the final velocity of the object as it falls It has more time to fall, so it will hit at a greater speed There isn't a law that states this, but it follows from the mechanics of constant acceleration You might want to note something about air resistance and terminal velocity
Torque Power: Understanding Angular Velocity - Physics Forums how can we say that torque is equal to power angular velocity though we know that torque is equl to I x (change of angular velocity over time ) and how can we relate torque to (angular velocity) , as we know that a rotating gear at constant angular velocity has no torque on it or bettter
At What Velocity Does the Universe Expand and Can It Be Faster than Light? You may sometimes see statements that cosmological inflation caused the universe to expand faster than c, or that the edge of the observable universe occurs at the place where the Hubble law gives a velocity equal to c The first statement is incorrect because the expansion of the universe can’t be measured with a single velocity
Why Is Initial Velocity Not Always Zero? - Physics Forums The initial velocity of this ball is at the moment is resting at the table and it is therefore zero, however for the purpose of the problem we consider as "initial" velocity the final velocity at which the ball leaves our hand
Why is velocity squared in the equation for kinetic energy? I believe it was Newton who first proposed kinetic energy as being proportional to mass times velocity Liebniz further refined the relationship by stating that the velocity should be squared That was later confirmed by Willem 'sGravesande and Emilie du Châtelet The squaring also is a basis
Is Velocity Zero if Displacement is Zero? - Physics Forums Joseph Austin said: I'm just confuse about one part in velocity, so if your displacement is 0 the velocity is always 0? yeah? The average velocity is then zero There is also the concept of instantaneous velocity which applies at any given instant anywhere along the path
Average Speed vs. Velocity: Explained - Physics Forums Though average speed over a finite interval of time is greater or equal to the magnitude of the average velocity, Instantaneous speed at an instant is equal to the magnitude of the instantaneous velocity at that instant Why so?