Question
A car moving at a speed of 30 kilo meters per hour is brought to a halt in 8 metres by applying brakes. If the same car is moving at 60 km. per hour, it can be brought to a halt with same breaking power in
Answer: Option D
:
D
Fromv2=u2−2as0=u2−2ass=u22a⇒sαu2(ifa=constant)s2s1=(u2u1)2=(6030)2=4⇒s2=4s1=4×8=32metres.
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:
D
Fromv2=u2−2as0=u2−2ass=u22a⇒sαu2(ifa=constant)s2s1=(u2u1)2=(6030)2=4⇒s2=4s1=4×8=32metres.
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