Week 5 learning module is ready

The week 5 learning module is now up, covering the concept of momentum. We will be trying to focus on momentum in Writing Assignment 1, 2 and 3, so dive in.

The writing assignments will also focus on energy and angular momentum, which form the core concepts of next week's and the week after's learning modules. So I will release those learning modules this weekend. You can get a head start in studying ahead.