A car was moving at a speed of 120km/hr on an expressway, suddenly the tyre of the car got punctured and burst. The driver of the car did not apply sudden brakes but he showed down his vehicle and finally stopped at a road side choosing the appropriate place. All the passengers in the car were shocked but glad with the driver’s decision.
What value of driver is seen in this act?
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Answers
Answered by
2
Answer:
Let the ppossible reaction time bets
So the car moves 120tm And applied breaks with retardation 5m/s 2
Explanation:
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Answered by
1
Given,
Speed=20m/s,d=50m,retardation=5m/s
2
Let the ppossible reaction time be t
s
So the car moves 20tm And applied breaks with retardation 5m/s
2
So, the total distance under retardation is ≤50m
Thus the distance under the application of retardation =
2×5
20
2
−0
2
=s
′
⇒s
′
=40m
Therefore, 20t
s
+40≤=50⇒20t
s
≤50−40⇒20t
s
=10⇒t
s
≤
2
1
≤0.5s
Speed=20m/s,d=50m,retardation=5m/s
2
Let the ppossible reaction time be t
s
So the car moves 20tm And applied breaks with retardation 5m/s
2
So, the total distance under retardation is ≤50m
Thus the distance under the application of retardation =
2×5
20
2
−0
2
=s
′
⇒s
′
=40m
Therefore, 20t
s
+40≤=50⇒20t
s
≤50−40⇒20t
s
=10⇒t
s
≤
2
1
≤0.5s
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