Loss of traction between the rear wheels and road surfaces like ice, sand, or gravel results in what is called

Fish tailing

Explanation:

Fish tailing is the vehicle handling problem which occurs due to the decrease in friction between the the rear wheels and the surface. So we mostly observe that rear wheels slide out of control when there is rain or ice covered roads, sand etc. They reduce the friction of the surface resulting in over-steering. This problem is named as fish tailing.

this could be newton#'s law of cooling. the cooling curve is exponential

i think it would be 5