Question

the driver of a car that is travelling at 8.5 km/h slams the breaks and comes to a complete stop in 1.69 sec. How far, in meters, does the car travel before stopping

Answer 1

Given data

A car traveling at the speed of

Car takes a sec to a complete stop after applying brakes.

Due to applying brake car must have retardation and stops after 1.69 sec.

applying the First equation of motion.

Here v= final velocity, u = initial velocity , a = acceleration , t= time taken.

,, ,

Here acceleration is -ve it means retardation.

To find how far car has traveled ? we have to apply second equation of motion.