if boy is standing faraway from a car in distance of 3.2 metres so how much time he take to reach there?
Answers
Answer:
Step-by-step explanation:
Reaction distance
The reaction distance is the distance you travel from the point of detecting a hazard until you begin braking or swerving.
The reaction distance is affected by
The car’s speed (proportional increase):
2 x higher speed = 2 x longer reaction distance.
5 x higher speed = 5 x longer reaction distance.
Your reaction time.
Normally 0.5–2 seconds.
45–54 year-olds have the best reaction time in traffic.
18–24 year-olds and those over 60 have the same reaction time in traffic. Young people have sharper senses but older people have more experience.
The reaction distance can be decreased by
Anticipation of hazards.
Preparedness.
The reaction distance can be increased by
The necessity of decision-making (for example, between braking or steering out of the way).
Alcohol, drugs and medication.
Tiredness.
Easy method: Calculate the reaction distance
Formula: Remove the last digit in the speed, multiply by the reaction time and then by 3.
Example of calculation with a speed of 50 km/h and a reaction time of 1 second:
50 km/h ⇒ 5
5 * 1 * 3 = 15 metres reaction distance
More precise method: Calculate the reaction distance
Formula: d = (s * r) / 3.6
d = reaction distance in metres (to be calculated).
s = speed in km/h.
r = reaction time in seconds.
3.6 = fixed figure for converting km/h to m/s.
Example of calculation with a speed of 50 km/h and a reaction time of 1 second:
(50 * 1) / 3.6 = 13.9 metres reaction distance
Answer:
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