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  4. The shortest distance (in metres) in which an automobile moving at a speed of 90kmh- 1 can be stopped while travelling on a road whose coefficient of kinetic friction is 0.2 is P metres. Then, the value of P/10 is: (Take g = 10 m / s2

Q. The shortest distance (in metres) in which an automobile moving at a speed of can be stopped while travelling on a road whose coefficient of kinetic friction is is metres. Then, the value of is: (Take

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Solution:


By Newton's third law,
Also,



we have,




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