A motorist traveling at 10 m/s encounters a
deer in the road 40 m ahead.
If the maximum acceleration the vehicle’s
brakes are capable of is −7 m/s
2
, what is the
maximum reaction time of the motorist that
will allow her or him to avoid hitting the deer?
Answer in units of s
If his or her reaction time is 3.38571 s, how
fast will (s) he be traveling when (s)he reaches
the deer?
Answer in units of m/s

Question

A motorist traveling at 10 m/s encounters a
deer in the road 40 m ahead.
If the maximum acceleration the vehicle’s
brakes are capable of is −7 m/s
2
, what is the
maximum reaction time of the motorist that
will allow her or him to avoid hitting the deer?
Answer in units of s
If his or her reaction time is 3.38571 s, how
fast will (s) he be traveling when (s)he reaches
the deer?
Answer in units of m/s