Asked by maddie

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?
Answered by Count Iblis
It is equal to the kinetic energy of the electron.
Answered by maddie
how do you find the kinetic energy though?
Answered by Brandon
0.5*mass*velocity squared
Answered by maddie
I tried that but the answer I came up with was incorrect... Are you sure that's the right way to solve this?
Answered by brian
the kinetic energy on e- is negative
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