A pair of fuzzy dice is hanging by a string from your rearview mirror. While you are accelerating from a stoplight to 29 m/s in
5.7 s, what angle θ does the string make with the vertical?
And just sum of forces=0
Note: v_f^2 is final velocity squared
The Attempt at a Solution
I'm lost because it seems to me that the mass of the dice must be known to solve?