Home Physics Newton's Laws of Motion NEET Previous Year Question Consider a car moving along a straight horiz…
Physics Newton's Laws of Motion NEET Previous Year Question MCQ (Single Correct)

Consider a car moving along a straight horizontal road with a speed of 72 km/h If the coefficient of static friction between the tyres and the road is 0.5, the shortest distance in which the car can be stopped is (taking g=10m/s 2 )

A
30 m
B
40 m
C
72 m
D
20 m

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Verified by Experts
The correct answer is:
B

Step 1: Calculation of acceleration due to friction force
For stopping the car in shortest distance without skidding(sliding), the maximum static friction should act in opposite direction.

Now, Applying Newton's second law on car along x-direction (Rightwards Positive)

Negative means left direction (retardation)
Step 2: Calculation of Stopping distance
Since Retardation is constant, so applying kinematics equation of motion:

Shortest distance in which car can be stopped is 40 m

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