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Ronch [10]
3 years ago
11

you throw a rock out of a 7th story window. you time that it takes 3.7 seconds to hit the ground, and measure that it hit the gr

ound 115 m from the base of the building
Physics
1 answer:
seropon [69]3 years ago
7 0

First of all, I doubt it ... you threw the rock out of your hand
at least 69.5 miles per hour ? ?  Maybe more, depending on
the angle.

And that's all I have to say about this one, since you haven't
asked any question.
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goldenfox [79]

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frosja888 [35]

Answer:

Weight needed to balance the bar is 8.5N

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\sum m_i=0\\2(m)+8(1)-8(0.5)-7(3)=0\\2m+8-4-21=0\\2m-17=0\\2m=17\\m=\frac{17}{2}=8.5\\So,\ m=8.5N

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