KinematicsMedium
Question
An automobile travelling with speed of 60 km/h, can brake to stop within a distance of 20 cm. If the car is going twice as fast, i.e 120 km/h, the stopping distance will be
Options
A.20 m
B.40 m
C.60 m
D.80 m
Solution
If the initial speed is doubled, the stopping distance becomes four times, i.e. 80 m.
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