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3 years ago

Does the law of inertia pertain to moving objects, objects at rest, or both? Support your answer with example

1 answer:

7 0

The law of inertia pertains to both objects at rest and objects travelling in uniform motion (constant rate of motion so acceleration = 0).

ie of an object at rest: A person pushes a building with as much force as possible. The building is at rest and doesn’t move due to its inertia.

ie of an object travelling in uniform motion: An apple is thrown out of a car window. The apple bounces and moves on the ground after it is thrown out the window because of its inertia.

Hope this helps! :)

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A mass M is attached to an ideal massless spring. When this system is set in motion with amplitude A, it has a period T. What is

frutty [35]

<h2>Option B is the correct answer.</h2>

Explanation:

Period of a spring mass arrangement is given by

$T=2\pi\sqrt{\frac{m}{k}}$

where m is mass and k is spring constant.

So period of spring mass arrangement is independent of amplitude of motion.

Here amplitude changes from A to 2A.

Period for amplitude A is given by T.

Since period remains same for amplitude 2A also, the period is T.

Option B is the correct answer.

6 0

3 years ago

Which of the following statements describes an interaction between the atmosphere and biosphere?

Schach [20]

Answer:

well 1. its not 100 points it is 5 points.....and 2.the answer is D. I did the same test and it was D.

Explanation:

brainliest?

4 0

3 years ago

Fundamentally, pressure is defined as force per unit area. What is the source of the force in a gas sample? A) The force is from

Artist 52 [7]

Answer:

Option C

Explanation:

Given

Pressure = Force /Area

For any gas sample, force is defined as basically the force exerted by the gas molecules when they strike the surface (with in which they are contained) and bounce back.

Hence, Option C is the correct

6 0

3 years ago

If the entire population of Earth were transferred to the Moon, how far would the center of mass of the Earth-Moon-population sy

Genrish500 [490]

The question is incomplete. The complete question is :

If the entire population of Earth were transferred to the Moon, how far would the center of mass of the Earth-Moon population system move? Assume the population is 7 billion, the average human has a mass of 65 kg, and that the population is evenly distributed over both the Earth and the Moon. The mass of the Earth is 5.97×1024 kg and that of the Moon is 7.34×1022 kg. The radius of the Moon’s orbit is about 3.84×105 m.

Solution :

Given :

Mass of earth, $M_e = 5.97 \times 10^{24} \ kg$

Mass of moon, $M_m = 7.34 \times 10^{22} \ kg$

Mass of each human, $m_p =65 \ kg$

Therefore mass of total population, $M_p = 65 \times 7 \times 10^{9} \ kg$

$M_p = 4.55 \times 10^{11} \ kg$

Let the earth is at the origin of the coordinate system. Then,

Since $M_e>> M_p$

$M_m>> M_p$

Hence if we shift all the population on the moon there will be negligible change in the mass of the moon and earth. Hence there will not be any significant shift on the centre of mass. i.e.

$X_{cm} = \frac{5.97 \times 10^{24}+ 7.34 \times 10^{22} \times 3.84 \times 10^5}{5.97 \times 10^{24}+ 7.34 \times 10^{22}}$