Ann is driving down a street at 63 km/h. Suddenly a child runs into the street. If it takes Ann 0.796 s to react and apply the brakes, how far will she have moved before she begins to slow down? Answer in units of m.

13.93 m

Explanation:

initial velocity, u = 63 km/h

Convert km/h into m/s

so, u = 63 km/h = 17.5 m/s

reaction time, t = 0.796 s

Distance traveled by Ann before slowing down = speed of Ann x reaction time

= 17.5 x 0.796

= 13.93 m

Thus, the distance traveled by Ann before slowing down is 13.93 m.