Question

What will be the mass of a proton if the magnitude of the gravitational and electrostatic forces between two protons were equal?

Answer 1

Answer:

COULOMB’S LAW

F

=

k

∣

q

1

q

2

∣

r

2

Coulomb’s law calculates the magnitude of the force F between two point charges, q1 and q2, separated by a distance r. In SI units, the constant k is equal to

k

=

8.988

×

10

9

N

⋅

m

2

C

2

≈

8.99

×

10

9

N

⋅

m

2

C

2

The electrostatic force is a vector quantity and is expressed in units of newtons. The force is understood to be along the line joining the two charges.

Answer 2

Answer:

Explanation:

From Coulomb's law, F=kq^2/r^2

Newton's law of universal gravitation, F=Gm1m2/r^2.

Comparing the above equations, m=kq^2/G

m=(9E9×(1.6E-19)^2)/6.7E-11

m=3.44E-18kg