Respuesta :
Answer:
Explanation:
The reaction time will be equal to the time the ruler takes to fall by 6.4 cm .
the ruler is falling with acceleration due to gravity which is equal to
9.8 m /s²
S = ut + 1/2gt²
s is distance of fall , u is initial velocity , t is time and g is acceleration due to gravity .
6.4 = 0 + 1/2 x 9.8 t²
t = 1.14 s .
So reaction time is 1.14 s .
Answer:
0.114s
Explanation:
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The reaction time is simply how long it takes the ruler to fall 6.4 cm.
For this problem, all you gotta do is convert your units and then plug them into a kinematic equation for t (time).
{*0.01 the conversion from cm to m}
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Units:
Δx (change in x) or d = 6.4 cm = 0.064m
Vi = 0 m/s
a = 9.81 m/s^2
t = ?
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[tex]d = Vi * t + \frac{1}{2} *a*t^{2}[/tex]
(0.064) = 0 * t + 1/2 * (9.81) * t^2
↓
0.064 = 1/2 * (9.81) * t^2
↓
0.064 = 4.905 * t^2
↓
0.01304791 = t^2
↓
t = 0.114s
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Your reaction time is 0.114s
