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Leviafan [203]
4 years ago
5

Why isn't space expanding within systems such as our solar system or the milky way?

Physics
1 answer:
mezya [45]4 years ago
4 0
The main reason for this is gravity. Gravity between objects in our solar system and milky way is strong enough to counteract this expansion. Hope it helps.
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Determine the force the sun exerts on an object with a mass of 80.0 kg if that object is on the earth. What is the force exerted
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Two forces P and Q act on an object of mass 15.0 kg with Q being the larger of the two forces. When both forces are directed to
Rom4ik [11]

Answer:

P=6.25N  and Q=16.25N

Explanation:

In order to solve this problem we must first draw a free body diagram for both situation, (see attached picture).

Now, we need to analyze the two free body diagrams. So let's analyze the first diagram. Since the body is accelerated, then the sum of forces is equal to mass times acceleration, so we get:

\Sigma F=ma

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the sum of forces will be:

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We can do the same analysis for the second free body diagram:

\Sigma F=ma

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so now we have a system of equations we can solve by elimination:

Q+P=22.5N

Q-P=10.5N

Now, we can add the two equations together so the P force is eliminated, so we get:

2Q=32.5N

now we can solve for Q:

Q=\frac{32.5N}{2}

so

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Q+P=22.5N

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when substituting for Q we get:

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They can be the same shape & size but they can have different mass. And mass is density so if they have different masses then they have different densities.


MASS=DENSITY
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3 years ago
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