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An automobile travelling with a speed of...

An automobile travelling with a speed of 60 km/h, can brake to stop within a distance of 20 m. If the car is moving twice as fast i.e. 120 km/h, the stopping distance will be

A

20 m

B

40 m

C

60 m

D

80 m

Text Solution

Verified by Experts

The correct Answer is:
d
Here, `(s_1)/(s_2)=(v_1^2)/(v_2^2)`
`(20)/(s_2)=(60xx60)/(120xx120)=1/4` or `s_2=80 m`.
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