1. Can someone please help with this equation 2.An accelerating lab cart passes through two photo gate timers 3.0 m apart in 4.2 s. The velocity of the cart at the second timer is 1.2m. What is the cat's velocity at the first gate? 3. So I am so confused as to how to find the initial velocity. I used d=(Vi + Vf/2) *t which is 3.0= (Vi + 1.2/2) *4.2. The solution Vi=0.23m/s. I have no clue if I am way off. Can someone please tell me if I am on the right track. Thank you! The last time I took physics was 8 years ago and now I'm trying to upgrade. Wish I spent more time on homework, less on hair!