Q. 42 : The maximum safe speed of a vehicle on a circular track is 15 km/hr. When the track becomes wet, the maximum safe speed is 10 km/hr. The ratio of coefficient of friction of the dry track to that of the wet track is. (a) 3: 2 (c) 9 : 4 (b) 2: 3 (d) 4 : 9

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Q. 42 : The maximum safe speed of a vehicle on
a circular track is 15 km/hr. When the track
becomes wet, the maximum safe speed is 10
km/hr. The ratio of coefficient of friction of the
dry track to that of the wet track is.
(а) 3 : 2
(c) 9 : 4
(b) 2: 3
(d) 4 : 9
Transcribed Image Text:Q. 42 : The maximum safe speed of a vehicle on a circular track is 15 km/hr. When the track becomes wet, the maximum safe speed is 10 km/hr. The ratio of coefficient of friction of the dry track to that of the wet track is. (а) 3 : 2 (c) 9 : 4 (b) 2: 3 (d) 4 : 9
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