- #1

bluesteels

- 28

- 1

- Homework Statement
- How much work would it take to push two protons very

slowly from a separation of 2.00 * 10^-10 m (a typical atomic distance) to 3.00 * 10^-15 m (a typical nuclear distance)?

- Relevant Equations
- PE = kqq'/r

q = 1.61*10^-19

r1= 2*10^-10

r2= 3*10^-15

k = (9*10^9)

u = (9*10^9)(1.61*10^-19)^2 * (1/[3*10^-15 ]- 1/[2*10^-10])

u = 7.68*10^-14 J

but here the question. I have been taught that W= -U so shouldn't the answer be negative??

When i look up at the solution all other sources say that the W = U and therefore the answer is in postive.

u = 7.68*10^-14 J

but here the question. I have been taught that W= -U so shouldn't the answer be negative??

When i look up at the solution all other sources say that the W = U and therefore the answer is in postive.