# physics (emergency!)

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?

1. 👍 0
2. 👎 0
3. 👁 203
1. It is equal to the kinetic energy of the electron.

1. 👍 0
2. 👎 0
2. how do you find the kinetic energy though?

1. 👍 0
2. 👎 0
3. 0.5*mass*velocity squared

1. 👍 0
2. 👎 0
posted by Brandon
4. I tried that but the answer I came up with was incorrect... Are you sure that's the right way to solve this?

1. 👍 0
2. 👎 0
5. the kinetic energy on e- is negative

1. 👍 0
2. 👎 0
posted by brian

## Similar Questions

1. ### PHYSICS

(1 pt) An aricraft carrier has a mass of 8.9 x10^7kg and can cruise at 55 km/h. a) What is the work required to stop it? J b) What constant force could stop it in 6 km? N a) If only half of the work required to stop it is done,

asked by applebottom on November 21, 2010
2. ### 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?

asked by Eden on October 17, 2010
3. ### Physics

How much work is required to stop an electron (m = 9.11*10^-31 kg) which is moving with a speed of 1.50×106 m/s?

asked by Emma on November 7, 2010
4. ### physics

How much work is required to stop an electron (m = 9.11 10-31 kg) which is moving with a speed of 2 106 m/s?

asked by Tiniyah on March 8, 2011
5. ### Physics help me guys

An aricraft carrier has a mass of 8.6*10^7 kg and can cruise at 80 km/h. a) What is the work required to stop it? B) If only half of the work required to stop it is done, what is its final speed in km/h For a) I found 2.123*10^10

asked by LEXIMAHO on March 26, 2016
6. ### Physics help me plss

An aricraft carrier has a mass of 8.6*10^7 kg and can cruise at 80 km/h. a) What is the work required to stop it? B) If only half of the work required to stop it is done, what is its final speed in km/h For a) I found 2.123*10^10

asked by PHYSICSS PLS on March 27, 2016
7. ### physics

I had wrote that was because I was told that in the beginning of the spring being wound the PE=KE. Can I check a concept question, The amount of work required to stop a moving object would be equal to the mass of the object times

asked by tatiana on November 5, 2006
8. ### physics

The homework question asks: which work woulf be required to stop a moving object: the intial speed, the intial kinetic energy of the object, the mass of the object times it acceleration, the mass of the object times its intials

asked by tatiana on November 5, 2006
9. ### Physics

1)An electron moved from point A to point B along an equipotential surface. a)the eclectron performs work in moving from point A to point B b)Work is required to move the electron from point A to point B c)Work is both required

asked by Andrea on April 6, 2008
10. ### chem

Ionization energy is defined as the minimum energy required to remove an electron from the ground state (n0) to infinity (n∞). Determine the wavelength of radiation required to ionize the hydrogen electron from the n = 2 energy

asked by Mary on October 2, 2006

More Similar Questions