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monitta
3 years ago
14

The graph below shows the displacement of an object as a constant

Physics
1 answer:
SSSSS [86.1K]3 years ago
4 0

Answer:help

Explanation:  b.3.6 j

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In a common but dangerous prank, a chair is pulled away as a person is moving downward to sit on it, causing the victim to land
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Answer:

(a) \vec{J}=176.4\frac{kg*m}{s} \hat{j}

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Explanation:

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\Delta U=\Delta K\\mgh=\frac{mv^2}{2}\\v=\sqrt{2gh}\\v=\sqrt{2(9.8\frac{m}{s^2})(0.40m)}\\v=2.8\frac{m}{s}

This is the initial velocity in the negative y-direction. Impulse is given by:

\vec{J}=\Delta \vec{p}\\\vec{J}=m\vec{v_f}-m\vec{v_i}\\\vec{J}=63kg(0 \hat{j})-63kg(-2.8\frac{m}{s} \hat{j})\\\vec{J}=176.4\frac{kg*m}{s} \hat{j}

(b) The average force is:

F=\frac{J}{\Delta t}\\F=\frac{176.4\frac{kg*m}{s}}{0.083s}\\F=2125.30N

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3 years ago
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amplifying signals is the correct answer

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Currents of dry sinking air cause the dry conditions of earth's major deserts at: <span>30° N and 30° S Latitudes

At approximately 30 degrees from the equator, the air that moved up from the equator started to descends. This air, however, could only come from one direction. So when the air is blocked by a mountain, the other side will not receive any water that it contains. This makes the other sides of the mountain became really dry which will eventually cause the formation of the desert.</span>
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