I think it's Homeostasis. If not then I apologise.
I would say Se/x with a minor would be your answer.
I regret throwing a rock at my sister and hitting her in the forehead when I was 6 years old. I am 12 now.
Explanation:
acceleration = final velocity- initial velocity/time taken
acceleration =4.0m/s -0 m/s / 8 seconds
acceleration =4/8
acceleration =1/ 2
acceleration =0.5 ms^2
force = mass × acceleration
f = 86kg×0.5= 43 newtons