Question

A car declaration form 100 m/s to 60 m/s in the time t and the distance covered is 200 m find the time

Answer 1

v²-u²=2as
60²-100²=400a
3600-10000=400a
-6400/400=a
a=-16m/s²
v=u+at
60-100=-16t
-40/-16=t
t=2.5s