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2 years ago

If a runner decreases his velocity from 0m/s to +20m/s in 2.0s, what is was his average acceleration?

Physics

1 answer:

Brrunno [24]2 years ago

5 0

Answer:

-10 m/s²

Explanation:

Average acceleration is change in velocity over change in time.

a = (v − v₀) / (t − t₀)

a = (0 m/s − 20 m/s) / (2 s − 0 s)

a = -10 m/s²

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Musya8 [376]

Answer: 0.09 m

Explanation:

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3 years ago

Zoning laws establish _______.

Aleonysh [2.5K]

Answer:

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3 years ago

An airplane is flying from Dallas, Texas to Pensacola, Florida. Flying at maximum velocity, it encounters strong winds moving at

jenyasd209 [6]

Answer:

G. It will take twice as long.

Explanation:

Let's call $v$ the original speed of the plane and $d$ the distance between Dallas and Pensacola. The time the plane originally takes to complete the flight is

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In this problem, we are told that the plane encounters wind moving at half of its speed: $\frac{v}{2}$ , in the opposite direction. This means that the new speed of the plane is

$v'=v-\frac{v}{2}=\frac{v}{2}$

And so, the time the plane takes now to complete the flight is

$t'=\frac{d}{v/2}=2\frac{d}{v}=2t$

So, the plane takes twice the time as before.

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2 years ago

1. Who first published the classification of the elements that is the basis of our periodic table today?

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3 years ago

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Pretty sure it is clockwise if I am not mistaken

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3 years ago

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