Rate of change of momentum - p - - t So what does this - means-

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Standard IX

Physics

Acceleration

Rate of chang...

Question

Rate of change of momentum = Δp/Δt

So what does this Δ means?

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Solution

Δ means upper case delta .

Upper-case delta (Δ) often means "change" or "the change in" in mathematics. For example, if the variable "x" stands for the movement of an object, then "Δx" means "the change in movement." Scientists use this mathematical meaning of delta often in physics, chemistry, and engineering, and it appears often in word problem.
ex: initial movement P1 and final movement P2
So change of movement =Δp=p2- p1

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Q. Statement 1: Net torque acting on a system can be given as

{\to τ}_{net} = \to r \times \frac{d {\to P}_{sys}}{d t}

Where

\frac{d {\to P}_{sys}}{d t}

is the rate of change of momentum of the system.
Statement 2: Average torque acting on a system can be given as

{\to τ}_{avg} = \to r \times \frac{Δ {\to P}_{sys}}{Δ t} = \to r \times \frac{({\to P}_{f} - {\to P}_{i})}{Δ t}

where

\frac{Δ {\to P}_{sys}}{Δ t}

is change in momentum of system in time

(Δ t)

If the momentum of an electron is increased by $Δ p$ , then the de-Broglie wavelength associated with it changes by 0.50%. The initial momentum of the electron will be

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Rate of change of momentum = Δp/Δt So what does this Δ means?

Rate of change of momentum = Δp/Δt

So what does this Δ means?