What is the motion of a body when only the force of gravity is acting on it
Answers
the situation is called "free fall".
The motion is uniformly accelerated. The object falls
straight toward the center of the other object in whose
gravity it shares, and its speed increases at a constant
rate.
When this happens on or near the surface of the Earth,
the rate is (9.8 meters per second greater) for each
second of falling.
True free-fall is never observed in daily life. Whenever
we see an object falling, it is always falling through air,
which counteracts the force of gravity to a greater or
lesser degree, depending on the object's size, shape,
weight, surface texture, and speed through the air.
Related Questions
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If a material is ductile, it is most likely a ____________ . Question 24 options: A. Metalloid B. Noble Gas C. Non-Metal D. Metal E. Ion
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In any one material, all electromagnetic waves have the same A. amplitude. B. frequency. C. wavelength. D. velocity.
B.) atomic number from mass number
C.) atomic number from electron number
D.) isotope number from atomic number
Answers
To find the number of neutrons in an atom, what we must do is to follow the following steps:
1) Find the element in the periodic table.
2) Find the atomic number of the element. The atomic number is the number of protons of a single atom of that element.
3) Find the atomic weight of the element.
4) Finally, we look for the number of neutrons. For this, we follow the following relationship:
Atomic weight - number of protons = number of neutrons.
Answer:
To find the number of neutrons in an atom, you would subtract:
B.) atomic number from mass number
Option B is the correct answer, because the number of neutron is equal to the difference between the mass number and atomic number.
Further explain:
Before going about the calculation of the number of neutron in an atom, firstly we will know something about an atom.
An atom is a fundamental unit of matter. It is composed of nucleus and electrons orbiting around the nucleus.
The electrons in an atom are orbiting around the nucleus in the shells of different energies.
Maximum part of the mass of an atom is concentrated in its nucleus and it is composed of proton and neutron. They are also known as nucleons of an atom.
Proton and electron are the charge particles. Proton carries the positive charge while electron carries the negative charge of same amount, but neutron does not carry any type of charge so it is neutral.
The total number of electron is equal to the total number of proton is an atom.
That’s why atoms are neutral in nature.
Atomic number: The total number of electron or total number of proton in an atom is known as the atomic number.
Here, is the atomic number and
is the number of proton.
Atomic mass: The sum of number of proton and neutron in an atom is known as atomic mass or mass number.
So, atomic mass can be calculated as,
Here, is the atomic mass or mass number and
is the number of neutron .
So, number of neutron can be calculated as,
So, number of neutron is equal to the difference between the mass number and number of proton or atomic number.
Learn more:
1. Water is a compound: brainly.com/question/4636675.
2. Acceleration of the box against the friction: brainly.com/question/7031524.
3. Example of energy brainly.com/question/1062501.
Answer detail:
Grade: High school
Subject: Chemistry
Chapter: Atom
Keyword:
Number of neutron, mass number, proton, electron, atomic number, atom, nucleus, difference, atomic mass, subtraction, orbit, neutral.
Answers
Answer:
the velocity of a moving body relative to another body is called relative velocity.
Answers
Answer:
Capture Theory
Explanation:
According to capture theory, moon is passing space rock-asteroid which was captured into the orbit around the Earth due to gravity. Other planets have moons which are captured asteroid like Mars has two moons-Phobos and Deimos. Jupiter has many moons which are captured asteroids. Capture theory explains the difference in the composition of Earth and the moon.
Answers
Final answer:
Aristotle supported geocentrism, the view that the Sun and all the planets revolve around the Earth. He did not support the concept of free-fall speed being independent of weight, a concept later verified by Galileo. Aristotle also proposed the existence of a fifth element, ether, in heavenly bodies.
Explanation:
Aristotle, the ancient Greek philosopher, supported the view that the Sun and all the planets revolve around the Earth. This model is known as Geocentrism or Ptolemaic system. His belief was widely accepted until the Copernican revolution in the 16th century, which provided a heliocentric model. The heliocentric model, the belief that the Earth and other planets revolve around the Sun, was questioned by Aristotle.
Furthermore, Aristotle did not support the view that the speed of a free-falling object is independent of its weight. This idea was later verified by Galileo. Also, the idea of every action having an equal and opposite reaction is associated with Newton's third law of motion, a concept that emerged much later than Aristotle's time. Lastly, Aristotle did propose the existence of a fifth element, ether, that he believed existed in the heavenly bodies. Hence, he did not support the view that ether does not exist in heavenly bodies.
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In fact the idea Aristotle had was that this explained something about the nature of the universe. He noticed that when you push an object, it slows down and stops. Therefore he divided the universe into 'earth-like stuff' which preferred to remain stationary, and 'heavenly stuff' which preferred to be in motion. Newton showed this idea to be false when he effectively unified motion and being at rest - if you move at a constant velocity (like in a very large ship) you can't tell if you're moving at a constant velocity or whether you are at rest
Answers
delta v = change in velocity = velocity final - velocity initial.
= -22m/s - +18m/s = -40m/s.
mdeltav = (0.40kg)(-40m/s) = -16kgm/s or -16Ns.
Final answer:
Impulse corresponds to the change in momentum. Given a soccer ball weighing 0.40kg moving first at 18m/s north and then hit in the opposite direction at 22m/s, the impulse delivered to the ball by the player is approximately 16 kg.m/s in the opposite direction of the initial movement.
Explanation:
In the field of physics, impulse is defined as the change in momentum of an object upon interaction with an external force and is calculated by multiplying the force applied to the object by the time interval (duration) the force was acting. When a soccer player strikes the ball, he or she applies a force that changes the soccer ball's momentum.
Considering your question about the soccer ball, the initial momentum of the ball can be calculated by multiplying its mass (0.40 kg) by its velocity (18 m/s), giving 7.2 kg.m/s north. When the player hits the ball, it moves in the opposite direction (south) with a velocity of 22 m/s. Thus, the final momentum of the ball is 0.40 kg x -22 m/s = -8.8 kg.m/s.
Impulse is the change in momentum, so it's the final momentum minus the initial momentum, which equates to -8.8 kg.m/s - 7.2 kg.m/s= -16 kg.m/s south or +16 kg.m/s north, depending on the coordinate system you choose (north could be either positive or negative). Since the direction reversed, this is why we have a negative sign.
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b. it reaches terminal velocity
c. it shows increasing acceleration
d. it begins to slow down
Answers
So the answer is b