# Chapter 2 - Motion Along a Straight Line - Problems: 18a

x = 54m

#### Work Step by Step

The position is given by $x = 12t^2 - 2t^3$ where x is in meters and t is in seconds. The question asks for the position at t = 3s, therefore we need to find x(3) or plug in t = 3 into the equation. This gives us $x = 12*(3)^2 - 2*(3)^3 = 12 * 9 - 2*(27) = 108 - 54 = 54$ Therefore x = 54m

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.