Electricffiledcalcuate escape speed

Thread starter seto6
Start date Jun 3, 2010
Tags

Escape Speed

AI Thread Summary

The discussion focuses on calculating escape speed using electric field equations. The relevant equations include kinetic energy (KE = 1/2 mv^2) and electric potential energy (Ue = Eqs). The user attempts to solve the problem by setting final potential and kinetic energy to zero, leading to the equation v = (sEqs/m)^(1/2). The final answer for escape speed is confirmed to be 2.3 x 10^6 m/s. The thread highlights the importance of understanding energy conservation in electric fields.

Jun 3, 2010

seto6

electricffiled..calcuate escape speed! urgent please help

Homework Statement

Homework Equations

ke=1/2mv^2
Ue=Eqs
E=kq/r^2

The Attempt at a Solution

Uf+kf=Ki+Ui

Uf=0 and Kf=0

so -Ui=Ki
Eqs=1/2(mv^2)

v=(sEqs/m)^1/2 after this no clue i got lost help please

Last edited: Jun 3, 2010

Physics news on Phys.org

Jun 3, 2010

seto6

sry guys is the answer 2.3x10^6m/s

Jun 3, 2010

ehild

Science Advisor

Homework Helper

Yes, it is.

ehild

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...

View full post »

Thread 'Explain this asphalt sheen'

This problem is two parts. The first is to determine what effects are being provided by each of the elements - 1) the window panes; 2) the asphalt surface. My answer to that is The second part of the problem is exactly why you get this affect. And one more spoiler:

View full post »