3 years ago

5. A wire, resistance 23.6 carries a current. 5.9 A. What is the

Physics

1 answer:

finlep [7]3 years ago

7 0

Answer:

Explanation:

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Explain Newton's third law in your own words.

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Newton's third law states "for every action, there is an equal and opposite reaction."

What this is pretty much saying is that for every action, there is a consequence. One force connects and triggers another.

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At the same moment, one rock is dropped and one is thrown downward with an initial velocity of 29m/s from the top of a building

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The thrown rock strike 2.42 seconds earlier.

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This is an uniformly accelerated motion problem, so in order to find the arrival time we will use the following formula:

$x=vo*t+\frac{1}{2} a*t^2\\where\\x=distance\\vo=initial velocity\\a=acceleration$

So now we have an equation and unkown value.

for the thrown rock

$\frac{1}{2}(9.8)*t^2+29*t-300=0$

for the dropped rock

$\frac{1}{2}(9.8)*t^2+0*t-300=0$

solving both equation with the quadratic formula:

$\frac{-b\±\sqrt{b^2-4*a*c} }{2*a}$

we have:

the thrown rock arrives on t=5.4 sec

the dropped rock arrives on t=7.82 sec

so the thrown rock arrives 2.42 seconds earlier (7.82-5.4=2.42)

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