# Physics

How much work is required to stop an electron (m= 9.11 * 10^-31 kg) which is moving with a speed of 1.80×10^6 m/s?

1. 👍 1
2. 👎 1
3. 👁 2,810
1. The work done ON the electron is negative, and equals the initial kinetic energy, (1/2)m*V^2.
Use V in m/s and m in kg and the answer will be in Joules.

1. 👍 3
2. 👎 1
2. 45.6 J

1. 👍 0
2. 👎 13

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