1.

A car moving along a straight highway with a speed of 108 km/h, is brought to rest! Within a distance of 100 m. How long does it take for the car to stop

Answer»

Answer:

100/15 SEC

Explanation:

v=u+at

0=30+at. (108km/h=30m/sec)

at=-30

now

s=ut+1/2at²

100=30t+1/2at²

100=t(30+1/2at)

100=t(30+1/2(-30))

100=t(30-15)=t(15)

t=100/15 sec



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