Here. The question is, if you understand this question, how much work is required to stop an electron having must this which is moving with a speed off 1.10 in tow, 10 to the power 6 m per second If we draw situation here. So this is electron, which is moving web initially speed 1.10 in two. 10 to the power 6 m per second and mass off. Electron is given 9.11 in tow, 10 to the power minus 31 K g. And finally this electron is coming to rest. So finally, speed, we can say it is zero. So now it is asking how much work is required. We stop this electron which is moving with this a spirit and having must this so we can apply work Kinetic energy, Terram. So apply work Dietetic energy Here. Um, according to this Terram work is equal toe change in kinetic energy. And we know the meaning off change that its final minus initial right, So we can Well, right here. Final kinetic energy minus kinetic initial kinetic energy. So final kinetic energy kinetic energy formalize happened we Squire. So if we apply this formula here, it will become half and we finally Squire miners have em. We initially square now we need to put the values here so we finally is equal to zero. So if we apply here, it will become zero minus Ah Massa off electron is 9.11 into 10 to the power minus 31 Into the initial is 1.10 in tow, 10 to the power plus six Squire. So it is a simple expression. We can solve it and after solving, we are getting minus 5.51 in tow 10 to the power minus 19 jewels. So work is asked So this is the final work which is required to stop the electron. So this is the final onset. I hope you enjoyed the solution.