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Which of the following phenomena CANNOT be explained using the universal law of gravitation?
Tides
Firing of a gun
Motion of the moon around the earth
Motion of planets around the Sun
Firing of a gun
Newton's Universal Law of Gravitation explains the gravitational attraction between objects with mass, such as celestial bodies. While it governs large-scale astronomical motions like tides and planetary orbits, the firing of a gun is governed by chemical energy, thermodynamics, and the laws of motion (specifically Newton's third law of motion regarding recoil), not by gravitational forces.
Newton's Universal Law of Gravitation explains the gravitational attraction between objects with mass, such as celestial bodies. While it governs large-scale astronomical motions like tides and planetary orbits, the firing of a gun is governed by chemical energy, thermodynamics, and the laws of motion (specifically Newton's third law of motion regarding recoil), not by gravitational forces.
Think of gravity as the 'invisible glue' holding the solar system together, whereas a gun firing is like a tiny, contained volcanic explosion pushing a rock out of a tube.
F=Gr2m1тАЛm2тАЛтАЛ тАФ Newton's Law of Universal Gravitation, where G is the gravitational constant, m are masses, and r is distance.
F=ma тАФ Newton's second law, governing the motion of a projectile once external forces (excluding gravity) are accounted for.
The Universal Law of Gravitation states that every point mass attracts every other point mass with a force proportional to the product of their masses and inversely proportional to the square of the distance between them. In contrast, firing a gun involves the rapid expansion of gases produced by a chemical reaction (combustion of propellant) inside the barrel, which exerts pressure on the bullet to propel it forward. This is a ballistic process determined by internal ballistics and chemical energy conversion, not by gravitational attraction between the bullet and the gun.
Gravity is a fundamental force responsible for planetary motion and tidal cycles.
The firing of a gun is an mechanical/chemical process governed by force, pressure, and mass acceleration.
Gravity acts on all objects with mass, but the magnitude of the force required to propel a bullet significantly exceeds the gravitational interaction between the bullet and the weapon.
Planetary orbit calculations
Understanding oceanic tidal patterns caused by the Moon and Sun
The constant of gravitation is GтЙИ6.674├Ч10тИТ11┬аN┬аm2kgтИТ2.
Option B is the correct answer because firing a gun is a chemical-ballistic process rather than a gravitational phenomenon.
B is correct тАФ Firing a gun is governed by chemical energy and thermodynamics, whereas the other options are direct consequences of gravitational interaction.
Always distinguish between 'Universal Forces' (Gravity, Electromagnetism) and 'Applied Mechanical Forces' (Pressure, Friction, Tension) when analyzing physics problems.
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