You step into an elevator on the 50th floor and it quickly accelerates downward. For a second, until steady speed is reached, __________. A.) your weight is unchanged but your mass decreases B.) your mass is unchanged but your weight decreases C.) neither your mass nor weight change but the gravitational force decreases D.) neither your mass nor weight change but your apparent weight decreases

Answers

Answer 1

Answer:

Answer:

Mass and weight would stay the same. However, the normal force between the person and the ground becomes smaller, making the weight of the person appear smaller.

Explanation:

The mass of an object is an intrinsic property. The mass of the object stays the same regardless of the motion of the object or the forces acting on the object. As a result, when the elevator accelerates downwards, the mass of this person would stay the same.

The weight of an object refers to the gravitational force on this object.

The gravitational force on an object is the product of the mass $m$ and the strength $g$ of the gravitational field:

$(\text{weight}) = m\, g$ .

The gravitational field strength near the surface of the Earth is mostly uniform ( $g \approx 9.81\; {\rm N\cdot kg^(-1)}$ .) Since the mass of this person stays the same, the weight of this person would also stay the same.

When a person stands on level ground, forces on this person would include:

Weight, which points downward, and
Normal force from the ground, which points upward.

The net force on this person would be:

$(\text{net force}) = (\text{weight}) + (\text{normal force})$ .

Rearrange this equation to obtain an expression for normal force:

$(\text{normal force}) = (-(\text{weight})) + (\text{net force})$ .

When the person is not moving, acceleration of the person would be zero. By Newton's Laws of Motion, the net force on this person would also be zero.

In the equation above, the magnitude of the normal force would be equal to the magnitude of weight. It would appear that the normal force on the person is equal in magnitude to the weight of this person.

However, when the person accelerates in the vertical direction, the net force on the person will become non-zero in the vertical direction. Normal force would no longer be equal in magnitude to weight.

Specifically, when the person accelerates downward in this elevator, acceleration of this person would point downward. Net force on this person would also point downward.

In the equation $(\text{normal force}) = (-(\text{weight})) + (\text{net force})$ , $(\text{weight})$ also points downward. However, because of the negative sign $(-(\text{weight}))$ and $(\text{net force})$ would be in opposite directions.

Additionally, the magnitude of net force cannot exceed the magnitude of weight. As a result, the magnitude of the sum of these two vectors would be smaller than the magnitude of weight.

The normal force on this object is equal to the sum of these two vectors. As a result, the magnitude of normal force would also be smaller than the magnitude when the person isn't moving. It would appear as if the apparent weight of this person has become smaller than the original value.

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Answers

Answer:

gravity effects only the mass of an object

Explanation:

an acorn is heavier that a stick and it's round shape gives it less wind resistance so gravity pulls it down faster. A stick vertical has little wind resistance but when rotated to when it is horizontal it has more resistance so it slows down but the the force of gravity is still as strong. A leaf has very little mass and it's shape provideds lots of wind resistance so it falls slower. The moon is not only effected by the earth's gravity it is also effected by the suns. It has its own gravity as well. with all these factors it stays in place and moves with the earth.

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Answers

Oh, I just realized you asked for a body part, and there is only one body part in the circulatory system, my bad. That would be the heart. But, it also contains veins, arteries, capillaries, and blood. It's main function to pump blood to supply oxygen to the body.

Hope this helps!

the would be ((((((heart )))))) the main part hoped i helped

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Answers

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Answers

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Answers

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Answers

Answer:

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Explanation:

leave a rating for my dying soul please. :)

Answer:

at the end

Explanation:

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