Concept explainers
The driver of a speeding empty truck slams on the brakes and skids to a stop through a distance d. On a second trial, the truck carries a load that doubles its mass. What will now be the truck’s “skidding distance”? (a) 4d (b) 2d (c)
The distance covered by truck after applying brakes.
Answer to Problem 1OQ
Option (d) the truck will cover the distance
Explanation of Solution
The distance covered by the truck after applying the brakes is given by the newton’s third equation of motion.
Write the expression for the distance covered by the truck as.
Here,
From equation (I), the distance skid by the truck is independent of the mass of the truck.
Conclusion:
Substitute
To bring the truck carrying the double mass to rest, the truck will skid through the same distance as that of the truck with less mass.
For the truck, after applying the brakes, it will cover the same distance
The distance covered by the truck is independent of mass. So it will not cover
The distance covered by the truck will not change when mass is increased so it will not cover
The distance covered by the truck is independent of mass. So it will not cover distance
The distance covered is mass independent.so it will not cover
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