The velocity of a point mass that moves along the s-axis is given by s = 40 - 3t^2

The displacement is -48m.

Explanation:

Velocity is the rate of change of displacement. So, the instantaneous displacement is calculated by the integration of velocity function with respect to time. Displacement in range of time is calculated by integrating the velocity function with respect to time with in time range.  

Given:

Velocity along the s-axis is

time range is t=2s to t=6s.

Calculation:

Step1

Displacement in the time range t=2s to t=6s is calculated as follows:

Step2

Integrate the above equation with respect to time with the lower limit as 2 and upper limit as 6 as follows:

s=160-208

s=-48m

Thus, the displacement is -48m.

A. Make an accident more likely to happen

Explanation:

You moving slow can cause someone driving at the speed limit to hit the brakes and having to press on the brakes so suddenly can cause a accident.

That just my opinion, I hope it helped =)