I'm thinking the answer is Vf or t but I'm not sure..

Question

Rewrite    Vf = Vi+a delta t    by plugging in 

2 delta d / Vi+Vf    For    Delta t.

 

when you do so you will get the equation in the question below:

 

So tell me, Vf^2=Vi^2+2ad is independent of what variable?
(1) Vf
(2) v
(3) t
(4) a

Answer 1

The kinematic equation

 

v_f² = v_i² + 2ad

 

does not depend on time t.  Answer (3) is correct.