PRoblem:(adsbygoogle = window.adsbygoogle || []).push({});

A 4.00-kg block is traveling to the right at 5.50 m/s, and a second 4.00-kg block is traveling to the left at 4.00 m/s. Find the total kinetic energy of the two blocks in this reference frame.

I did this by adding the two kinetic energies from the equation K =p^2/2m.

It then asks:

Find the velocity of the center of mass of the two-body system

and

Find the speed of the two blocks relative to the center of mass.

I was thinking about finding the x and y components of the collision and trying to find the answer that way but I dont know how to set up a drawing or which directions the blocks will be travelling after the collision. It has been a long week I am just confused!! Pleas help!!! :surprised

**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: Center of Mass and Collision

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