(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Two baseballs, each with a mass of 0.135 kg, are separated by a distance of 1170 m in outer space. If the balls are released from rest, what speed do they have when their separation has decreased to 710 m? Ignore the gravitational effects from any other objects.

2. Relevant equations

Universal law of gravity, Newton's 2nd law, Kinematics

3. The attempt at a solution

As of now, I've used the universal law of gravity and found that Fg = 3.55767e-18N. Using this force I found acceleration by using Newton's 2nd law of F = ma. The acceleration found was 2.632e-17m/s^2. Using this acceleration is it possible to use the 3rd kinematics of Vf^2 = vi^2 +2a(delta x) to solve for Vf?? Is this the way to solve this problem or am I completely off track?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Finding Speed of two objects in space

**Physics Forums | Science Articles, Homework Help, Discussion**