if the speed of a moving car is 30 m/s, then what will be its speed in km/h?
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At a car travelling at a speed of 30km/h is brought to rest in a distance of 8m by applying brakes if the same car is moving at a speed of 60km/h then that it can be brought to rest with same brakes in:
2
1
mv
2
=Fs
on the doubling, the speed and the required distance will become 4 times that is s=4×8=32m
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