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shaniqwakirkseyniqwa
01.08.2019 •
Physics
Acar slid off an icy 10m bridge and landed 12m away from the bridge. how much time was the car in the air? (hunt: projectile)
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Ответ:
You will use the height of the bridge from the ground.
Solution:
Formula to be used is y=Viy(t)+g(t^2)/2
Where:
Vi=initial velocity which is 0 m/s
y=10 m
Gravitational acceleration or g =9.8m/s^2
T= time you need
Substitute all the given to the formula
10m=(0m/s)(t)+(9.8m/s^2)(t^2)/2
10mx2=9.8m/s^2(t^2)
Now isolate the variable you want to find which is T or time
10mx2/9.8m/s^2=t^2
20m/9.8m/s^2=t^2
Square root of 2.04= square root of t^2
T=1.43 secs
The answer is 1.43 seconds
Ответ:
The formula to be used is y = Voy*t + g *(t^2) / 2, where the Voy is the intitial vertical velocity, which is zero.
Then, y = 10 m = g * (t^2) / 2 => t^2 = 2 * 10 m / g
=> t^2 = 2 * 10 m / 9.8 m/s^2 = 2.04 s^2
=> t = 1.43 s < answer
Ответ: