The mass of the asteroid is 9000 kg, and it is
approaching Earth at 45 m/s. If the rocket has a mass of 1800 kg, what
velocity must it have to completely stop the asteroid after collision?
A. - 225 m/s
B. 306 m/s
c. 45 m/s
D. - 116 m/s

Answerthe force between the charges will be  f/9 (one-ninth of force f)explanationcoulomb's law relates the magnitudes  two point charges q₁ and q₂, the distance, r, between the charges, and the electrostatic force, f, between the two charges:     k represents coulomb's constant, k = 8.99×10⁹ n·m²/c².note that if we have r = 3r, then   

The object's initial distance above the groundthe object's initial velocity