posted by Frank on .
Ann is driving down a street at 59 km/h.
Suddenly a child runs into the street.
If it takes Ann 0.774 s to react and apply
the brakes, how far will she have moved before
she begins to slow down?
Answer in units of m
distance= velocity*time=59km/hr*.774 seconds.
well, some unit conversion is in order.
distance= 59km(1000m/km)*1/hr * 1hr/3600s*.774 s
that does it.
Emily takes a trip, driving with a constant velocity of 81.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 72.8 km/h to the north, how long does the trip take?