Question

How much work is required to stop an electron (m = 9.11 10-31 kg) which is moving with a speed of 1.99 106 m/s?
Count Iblis
It is equal to the kinetic energy of the electron.
maddie
how do you find the kinetic energy though?
Brandon
0.5*mass*velocity squared
maddie
I tried that but the answer I came up with was incorrect... Are you sure that's the right way to solve this?
brian
the kinetic energy on e- is negative