Answer :
Answer:
Questions involving accelerating objects, including those in free fall, can be solved using three equations
y = 1/2at2 + v0t + y0
v = v0 + at
vf2 = v02 + 2 a (y - y0)
In this case, only the first equation is needed.
Since the object is falling the final height is 0 meters, the initial height is 370 m, and the acceleration is -9.8ms-2
Since the object is dropped, the initial velocity is 0.
0 = 1/2(-9.8)t2 + 370. t = sqrt(370/4.9) = 8.69 s
Explanation:
Answer:
Penny will take 8.8178 sec for free fall
Explanation:
We have given height of the deck h = 381 m
Acceleration due to gravity [tex]g=9.8m/sec^2[/tex]
According to second equation of motion we know that [tex]h=ut+\frac{1}{2}gt^2[/tex]
As there is free fall so initial velocity u = 0 m/sec
So [tex]381=0\times t+\frac{1}{2}\times 9.8\times t^2[/tex]
[tex]t=8.8178sec[/tex]
So penny will take 8.8178 sec for free fall