One boy is walking on the road suddenly one car come.Now what is his reaction?
Answers
Answered by
4
Answer:
Examples of pushing:
i) Pushing a heavy block to displace it from its original position.
ii) Pushing a trolley.
Examples of pulling:
i) Drawing a bucket of water from a well.
ii) Opening a drawer of a table.
Answered by
3
Answer:
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
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