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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
Understanding Zero Velocity and Non-Zero Acceleration: Explained I heard it would be possible to have zero velocity non zero acceleration (I know the opposite situation where there is velocity (constant), but zero acceleration) Could anyone please give me a clue on this? Thanks in advance
Calculating Nozzle Flow Rate - Physics Forums Calculating Nozzle Flow Rate To work out the flow rate of water from a nozzle we need to work out the volume in a given period of time To do this we work out the area of the nozzle and then multiply it by the velocity of the water coming from the nozzle to give us volume per unit of time
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?
Addition of Velocities (Velocity Composition) in Special Relativity 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 that arises from a “hyperbolic-tangent of a sum”-identity in Minkowski spacetime geometry, with its use of hyperbolic trigonometry However, I claim it is difficult to obtain this by looking at
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
Understanding Angular Velocity: W = 2pi (f) - Physics Forums Can anyone explain to me how angular velocity (w) = 2pi(f) -->where f = frequency This is not a homework question involving numbers I'm reading a section on "the period of sinusoidal Nature of SHM" and I don't understand how they get this equation
Why Does Doubling Velocity Increase Kinetic Energy by Four Times? After about 3 years of learning physics, I still can't understand how the kinetic energy formula works If the velocity of an object is doubled, why does the energy increase by a factor of four? Here's an example where this theory breaks down for me: I have a stationary object in space