Question

A car moving with 144 km/h is brought to rest within a distance of 100 m by applying of Breaks. How much time it will take to become at rest?

Answer 1

Answer:

ok wait....................

Answer 2

Answer:

Time taken will be=5seconds

Step-by-step explanation:

using equation 3rd

v^2=u^2+2as (v=0, u=40m/s)

0^2=40^2+2×a×100

0=1600+200×a

-1600=200×a

-1600/200=a

-8m/s^2=a

using equation 1st

v=u+at

0=40+(-8×t)

-40=-8×t

-40/-8=t

5seconds=t