A jet starts from rest and accelerates to a speed of 100 m/s in 10 seconds before taking off. how far does it travel before taki
2 answers:
Answer:
Explanation:
We want to find the distance the jet travels. Distance can be found by multiplying the speed by the time.
The speed is 100 meters per second.
The time is 10 seconds.
Substitute the values into the formula.
Multiply. Note that the seconds, or "s" will cancel each other out.
The jet travels <u>1,000 meters</u> before taking off.
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Answer:
= -32.53 m / s
this velocity is directed downwards
Explanation:
This is a free fall exercise, let's use the expression
= v_{oy}^{2} + 2 g (y -yo)
where we are assuming that there is friction with the air, as the body falls its initial velocity is zero
v_{oy} = √ 2g (y - y₀)
let's calculate
v_{y} = √ (2 9.8 (0-54.0))
= -32.53 m / s
this velocity is directed downwards