The driver of a car moving at 25m/s applies brakes, decelerates uniformly and stops
in 10 s. Another driver moving at 15 m/s applies brakes, decelerates uniformly and
stops in 20 s. Plot (v-t) graph for the two cars. Which of the two cars travelled farther
after the brakes were applied?
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Answer:
the car moving with 15 m/s will move more distance after applying brakes
Explanation:
in first car moving with 20m/s stops after 10 sec then the distance travelled is average velocity ×time taken (use this basic)
the the distance of first is{ (25+0)÷2 }×10=125m
the second car is {(15+0)÷2)}×20=150m
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