(Solved): The position of a mass oscillating on a spring is given by \( x=(4.2 \mathrm{~cm}) \cos [2 \pi t /( ...

The position of a mass oscillating on a spring is given by \( x=(4.2 \mathrm{~cm}) \cos [2 \pi t /(0.85 \mathrm{~s})] \). For the steps and strategies involved in solving a similar problem, you may view the following Example 13.3 video: (P) Pearson Copyright 12022 Pearson Education Inc. All rights reserved. Terms of Use I Privacy Policy I Permissions I Contaxt Us I Problem \( 13.10 \) - Enhanced - with Worked Example Video \( <\quad 5 \) of 20 Part A What is the period of this motion? Express your answer in seconds. X Incorrect; Try Again; 5 attempts remaining Problem \( 13.10 \) - Enhanced - with Worked Example Video ( 5 of 20 X Incorrect; Try Again; 5 attempts remaining Part B What is the first time the mass is at the position \( x=0 \) ? Express your answer in seconds.