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timurjin [86]
3 years ago
14

How long will it take an object dropped from a window to fall a distance of 78.4 meters?

Mathematics
2 answers:
Free_Kalibri [48]3 years ago
7 0
As you said it was dropped so in that case I'll take 78.4 meters as the height..
we know that
h = ut + 0.5*g*t(sqr)
t(sqr) = 78.4/(0.5*9.8) [g = 9.8 ms-2]
t = √16
t = 4
So it'd take 4 seconds
nordsb [41]3 years ago
6 0

Answer:

The time is 4 sec.

Step-by-step explanation:

Given that,

Distance = 78.4 m

We need to calculate the time

Using equation of motion

s=ut+\dfrac{1}{2}gt^2

t =\sqrt{\dfrac{2s}{g}}

Where, s = distance

g = acceleration due to gravity

t = time

t =\sqrt{\dfrac{2\times78.4}{9.8}}

t=4\ sec

Hence, The time is 4 sec.

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