Question

A car moving with a speed of 40km/hr can be stopped by applying brakes atleast after 2m. if the same moving with the speed of 80km/hr what is the minimum stopping distance​

Answer 1

Answer:

8km

Step-by-step explanation:

v2-u2=2as

substituting v=0, u=40 km/hr, s=2 km

0-40 square=2×a×2

a=400 km/hr square

for u=80 km/hr

0-80 square=2×(-400)×s

s=6400/800= 8 km