An electron of mass is travelling at .

PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

An electron of mass

9.1\times10^{-31}\,\text{kg}

is travelling at

4\times10^6\,\text{m s}^{-1}

. (1) Calculate the kinetic energy of the electron. (2) How much work must be done on the electron to speed it up to double its original speed?