Problem 4: [30] Two protons start very far apart and travel directly towards each other with speeds of 5.00 × 10 m/s measured relative to the ground. 4 (a) Find the closest distance between the protons they will reach. [8] (b) Find the maximum electric force they will exert on each other. [8] (c) Find the speed of each when the protons are one meter apart. [8] (d) What is the maximum speed they will achieve after they reverse direction? Explain your reasoning. [6]
(D) as they are very far apart so potential energy of system will be close to zero as it moves further , it PE will be about zero.
there is change in PE will be zero.
so final speed will remain same as given
v = 5 x 10^5 m/s
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