Hi everyone! Im really bad in physics so I need help in my assignments. My problem is what formula to use. Here's the problems. 1. The problem statement, all variables and given/known data An electron (mass = 9.11 x 10-31 kg) leaves one end of a tv picture tube with zero (0) initial speed and travels in a straight line to the accelerating grid, which is 1.80 cm away. It reaches the grid with a speed of 3.00 x 1006 m/s; If the accelerating force is constant, compute: a.) acceleration b.) time to reach the grid c.) net force in Newtons (gravitational force on the electron may be neglected) given: m = 9.11 x 10-31 vo = 0 m/s vF = 3.00 x 1006 d = 1.80 cm = 0.018m In A: I've thought of two formulas. Both give different results. These are: a = v/t Since there is no TIME, I will have to solve for time using: t = m(v - vo) / F The other formula I have thought of is: a = v2 / 2x (from v2 = vo2 + 2ax) In B: It's either: t = m(v - vo) / F or t = d/v both giving different results again In C: It's obviously F = ma... Please help me, I really don't know what formula to use.