Answer to Question #92247 in Mechanics | Relativity for Gracia Mendoza

Question

A car is moving down a street at 55 km/h. A child suddenly runs into the street. If it takes the driver 0.75s to react and apply the brakes, how many meters will the car have moved before it begins to slow down?

Answer 1

The distance traveled by car before driver apply the brakes

$$d=vt=55(\rm{1000\:m/3600\: s})\times 0.75(\rm{s})=11.5\:\rm{m}$$