Which of the following quantities is a velocity?
a. 25 m/s
b. 3 g/l in weight
c. 15 m/s2
d. 10 km/hr eastward

A

Explanation:

It’s A because the velocity is measured in m/s

it is called kinetic energy

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.