The driver of a car moving with a speed of 10ms−1 sees a red light ahead, applies breaks and stops after covering 10m distance. If the same car were moving with a speed of 20 ms −2 , the same driver would have stopped the car after covering 30 m distance. Within what distance the car can be stopped if travelling with a velocity of 15ms −1 ? Assume the same reaction time and the same deceleration in each case.

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Physics Problems

Question : The driver of a car moving with a speed of 10ms−1 sees a red light ahead, applies breaks and stops after covering 10m distance. If the same car were moving with a speed of 20 ms −2 , the same driver would have stopped the car after covering 30 m distance. Within what distance the car can be stopped if travelling with a velocity of 15ms −1 ? Assume the same reaction time and the same deceleration in each case.

(A) 18.75 m

(B) 20.75 m

(C) 22.75 m

(D) 25 m

Answer : option (A)

Solution :

The driver of a car moving with a speed of 10ms−1 sees a red light ahead, applies breaks and stops after covering 10m distance. If the same car were moving with a speed of 20 ms −2 , the same driver would have stopped the car after covering 30 m distance. Within what distance the car can be stopped if travelling with a velocity of 15ms −1 ? Assume the same reaction time and the same deceleration in each case.
The driver of a car moving with a speed of 10ms−1 sees a red light ahead, applies breaks and stops after covering 10m distance. If the same car were moving with a speed of 20 ms −2 , the same driver would have stopped the car after covering 30 m distance. Within what distance the car can be stopped if travelling with a velocity of 15ms −1 ? Assume the same reaction time and the same deceleration in each case.
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