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Ket [755]
3 years ago
13

Please solve really stuck much appreciated

Mathematics
1 answer:
Anna007 [38]3 years ago
3 0

Answers:

a) t=\sqrt{\frac{d}{4.9}}

b) 0.299 s

Step-by-step explanation:

a) We are given the following equation:

t=\sqrt{\frac{2d}{9.8}}

If we divide by 2 both the numerator and the denominator, we will have:

t=\sqrt{\frac{2d/2}{(9.8)/2}}

t=\sqrt{\frac{d}{4.9}}

b) From this equation:

t=\sqrt{\frac{2d}{9.8}}

t is the reaction time in seconds

d=44 cm \frac{1 m}{100 cm}=0.44 m is the distance

9.8 m/s^{2} is the acceleration due gravity

Solving:

t=\sqrt{\frac{2(0.44 m)}{9.8 m/s^{2}}}

t=0.299 s This is the reaction time

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