Question

A car with speed 72km /hr suddenly applies break. the break has maximum ability to decelerate with 5m/s². find taken to stop the car after applying break?​

Answer 1

Answer:

4sec

Explanation:

u=72km/hr=20m/s

v=0

acc=-5m/s2

v=u+at

0=20+(-5*t)

-20=-5t

-20/5=-t

-4=-t

4=t

Answer 2

Answer:

see answer in attachment...

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