In the experiment of finding the reaction time of Sunil, his friend releases a scale from rest in between the fingers of Sunil and notices the scale to fall by a distance of 20 cm before being held by Sunil. The reaction time of Sunil is (Use g = 10 ms⁻²) * 1 point
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Given : Sunil releases a scale from rest in between the fingers and notices the scale to fall by a distance of 20 cm before being held by Sunil.
To Find : The reaction time of Sunil
Solution:
releases a scale from rest
u = 0 m/s
t = Reaction time = ?
S = 20 cm = 20/100 m = 0.2 m
a = g = 10 m/s²
Using
S = ut + (1/2) at²
=> 0.2 = 0 + (1/2) (10) t²
=> 0.2 = 5t²
=> t² = 0.04
=> t = 0.2
Hence reaction time of Sunil is 0.2 sec
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