Using it's concept, it is found that the acceleration was of -0.5833 m/s².
The acceleration is the derivative of the velocity, hence, it is given by change in velocity divided by change in time, that is:
[tex]a = \frac{\Delta_v}{\Delta_t}[/tex]
In this problem, it changed -35 m/s, from 85 m/s to 50 m/s, in one minute = 60 seconds, hence:
[tex]\Delta_v = -35, \Delta_t = 60[/tex]
Then, the acceleration is:
[tex]a = \frac{-35}{60} = -0.5833[/tex]
-0.5833 m/s².
A similar problem is given at https://brainly.com/question/14516604
