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**1. Homework Statement**

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?

**2. Homework Equations**

v_f=v_0+a*t

x_f=x_0+v_0*t+0.5a*t^2

v_f^2=v_0^2+2*a(x_f-x_0)

x-x_0=[(v_0-v+v_f)/2]*2

And just sum of forces=0

F=ma

Note: v_f^2 is final velocity squared

**3. The Attempt at a Solution**

I'm lost because it seems to me that the mass of the dice must be known to solve?