If you have been paying attention, this lab should look pretty familiar! Yes, it is VERY close to the last lab “Measuring Acceleration”. This lab takes it just one step further by introducing the relationship between acceleration and mass. If you do not have time to do this lab now or would prefer to do this lab when starting forces, feel free to either skip this lab or do it later. It’s entirely up to you and the way that you prefer to introduce concepts to your students! I go ahead and do this lab now, but then when talking about Newton’s second law I always remind the students of this lab and ask them to go back and take a look at their results. This lab provides a great way to bridge the two units on motion and forces.