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- Problem in understanding instantaneous velocity - Physics Forums
The average velocity is the rate of change of position over a time interval, while the instantaneous velocity is the rate of change of position at a point in time As a time interval approaches a point in time, the average velocity approaches the instantaneous velocity
- 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
- 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
- Addition of Velocities (Velocity Composition) in Special Relativity
The “Addition of Velocities” formula (more correctly, the “Composition of Velocities” formula) in Special Relativity 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 the Galilean version of this formula and then
- Vertical circular motion minimum speed proof - Physics Forums
hi, i've read in a lot of places that the minimum speed fora body to "finish" a vertical circle is (rg)^0 5, but I've never understood why they assume the
- Derivation of velocity in nth Bohr orbit - Physics Forums
Homework Statement (a) Derive an expression for the electron's speed in the nth Bohr model (b) Prove that the orbit with highest speed is the n = 1 orbit,with v(1) = ke^2 h compare this with the speed of light , and comment on the validity of ignoring relativity (as we did) in
- Invariance of 4-velocity - Physics Forums
The vacuum-speed-of-light is a scalar invariant under Lorentz transformations, while the 4-velocity is a 4-vector and is therefore not invariant (although the scalar product of two 4-vectors is invariant) If you define 4-velocity as a derivative of the position vector with respect to the interval (where ), then you obtain the 4-velocity of the
- Solving for distance using only initial velocity and coefficient of . . .
Actually, althought relating the Kinetic Energy equation to the equation about friction and distance might be conceptually valid, it isn't the clue this person needed At the early point (probably around chapter 4) of an "elementary physics" textbook, a student encounters problems where, given an initial velocity and coefficient of friction , the student is expected to provide the resulting
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