Question

A car travels with a velocity of 80km/ hr can be stopped in 5m by applying brakes. If it travels with the speed of 160km/hr , what is the stopping distance?​

Please anyone answer a little faster

Answer 1

1st case:

Speed 80km/hr
Distance = 5m= 5/1000 km = 0.005 km
So, time = distance/speed = 0.005/80 = 1/16000hr

2nd case:

Speed = 160km/hr
Time = 1/16000 hr
therefore, distance = 160 × 1/16000 = 1/100
= 0.01 km = 10m

Hence, stopping distance = 10m

Alternative method:
(common sense method)

Speed = 80......distance = 5m
Speed = 160...... distance = 10m

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