JEE Main Physics question
The driver of a car moving with a speed of 10 ms sees a red light ahead, applies brakes, and stops after covering a 10 m distance. If the same car were moving with a speed of 20 ms, the same driver would have stopped the car after covering a 30 m distance. Within what distance can the car be stopped if travelling at a velocity of 15 ms? Assume the same reaction time and the same deceleration in each case.
Answer: (A)
Solution
Total stopping distance (reaction distance + braking distance). … (i); … (ii). From (i):
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