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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
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
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
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
Vinyl records, RPMs, and velocity. How does it work? So, Physics Forum, which is it? Does a record player accommodate for this difference in velocity through design (grooves, stylus arm, etc ) or is the groove cut the same at any point with the radius of stylus location having no effect, and making me a complete fool who doesn't understand how rotation works?
How to find the initial velocity given only angle and distance traveled Right so vertically final velocity is zero We have the initial velocity as 27 586 m s at an angle of 33°, so what is the vertical component of this velocity? We have 1) Final velocity 2) Initial velocity 3)Acceleration and we want to find 4) distance Do you know a kinematic equation (SUVAT equations) that has all these quantities?
Calculating velocity in a slingshot - Physics Forums However, using the height, gravitational acceleration, and the knowledge that the initial vertical velocity was 0, I was able to calculate the time the projectile was in motion for