• #### Newton's Third Law of Motion

Newton's third law states: To every action there is an equal and opposite reaction. Newton's third law implies that forces always come in pairs. In fact, these force pairs have the same origin and nature. If one is gravitational, then so is the other;...

https://astarmathsandphysics.com/ib-physics-notes/mechanics/1376-newton-s-third-law-of-motion.html
• #### Newton's Second Law

Newton's Second Law states "The acceleration of an object is directly proportional to the resultant force acting on it and inversely proportional to its mass". We may write this in the form of an equation: or We can use this equation to define the the...

https://astarmathsandphysics.com/a-level-physics-notes/forces-and-motion/2794-newton-s-second-law.html
• #### Newton's Third Law of Motion

Newton's third law of motion states, 'To every action there is an equal and opposite reaction'. This means that if an object A exerts a force on object B then object B exerts an equal and opposite force on object A. More crudely, when you push...

https://astarmathsandphysics.com/gcse-physics-notes/785-newton-s-third-law-of-motion.html
• #### Newton's Second Law of Motion

Newtons first law of motion states that a body subject to no net external forces continues in a state of uniform motion. His second law of motion in a sense makes his first law complete by telling us what will happen in the event of a body being...

https://astarmathsandphysics.com/ib-physics-notes/mechanics/1375-newton-s-second-law-of-motion.html
• #### Newton's Three Laws of Motion

Newtons three laws of motion govern the basis of how things move. At the basis of the three laws is the concept of force. Newton's First Law of Motion A rigid body subject to no net external force continues in a state of uniform motion. No net force so...

https://astarmathsandphysics.com/o-level-physics-notes/196-newton-s-three-laws-of-motion.html
• #### Newton's First Law of Motion

Newton's first law of motion – the first of three – states that 'a body continues in a state of uniform motion unless acted on by unbalanced forces'. The word 'uniform' here means constant speed in the same direction. The converse is also true, so that...

https://astarmathsandphysics.com/gcse-physics-notes/783-newton-s-first-law-of-motion.html
• #### Newton's Second Law of Motion

Newton's second law of motion states that the acceleration experienced by a body is directly proportional to the unbalanced force acting on it. If a body is subject to an unbalanced force it experiences an acceleration a given by In fact the constant...

https://astarmathsandphysics.com/gcse-physics-notes/784-newton-s-second-law-of-motion.html
• #### Newton's 1st Law of Motion

Newton's First Law of Motion A body continues in a state of uniform motion unless acted on by a net external force. There are several points to be noted. Uniform motion here means a constant speed in a straight line. Motion in a circle is not uniform...

https://astarmathsandphysics.com/a-level-physics-notes/forces-and-motion/2792-newton-s-first-law-of-motion.html
• #### Newton's Law of Gravity

Newtons Law of Gravity states: Every particle in the Universe attracts every other particle with a force which is proportional to the product of the two masses and inversely proportional to the square of the distance between them. The force acts on...

https://astarmathsandphysics.com/a-level-physics-notes/forces-and-motion/2793-newton-s-law-of-gravity.html
• #### Newton's Third Law of Motion

Newton's Third Law of Motion states: To every action there is an equal and opposite reaction. By action, the law means force or impulse These are very closely related, since It means basically that if you give something a shove, it shoves back. In a...

https://astarmathsandphysics.com/a-level-physics-notes/forces-and-motion/2795-newton-s-third-law-of-motion.html
• #### Verification of Newton's Second Law Using a Tickertape

Apparatus: 1 x runway, 9 x 10g masses plus holder, string, scissors, dynamics trolley, tickertape, tickertape timer, lab power supply, 2 x long wires, runway, pulley, drawimg pin or selloptape, access to a top-pan balance. Diagram: Procedure: 1. Set up...

https://astarmathsandphysics.com/a-level-physics-notes/experimental-physics/2740-verification-of-newton-s-second-law-using-a-tickertape.html
• #### Proof of Newton's First Law of Motion

Theorem A body continues in a state of uniform motion unless acted on by an external force. Proof Let a body consist of particles of mass at position vectors The equation of motion for particle is The force acting on the body is The position vector of...

https://astarmathsandphysics.com/university-physics-notes/classical-mechanics/1532-proof-of-newton-s-first-law-of-motion.html
• #### Mechanical Determinism

Newtonian mechanics is a complete system. Given a state of a system of particles and the mass, velocity and position of each particle, the state of the system – the position and velocity of each particle can be determined at any subsequent or previous...

https://astarmathsandphysics.com/ib-physics-notes/the-history-and-development-of-physics/1317-mechanical-determinism.html
• #### The Molecular Model of an Ideal Gas

An ideal gas is a model of a gas that treats the gas molecules as points of infinitesimally small size that obey all Newton's Laws of motion and undergo only elastic collisions with each other and the walls of the container. In detail, the assumptions...

https://astarmathsandphysics.com/ib-physics-notes/thermal-physics/1484-the-molecular-model-of-an-ideal-gas.html
• #### The Navier - Stokes Equation

The Navier – Stokes equation models the behaviour of a fluid element because of the forces acting on it, including viscous forces. When the viscous forces are ignored, the equations become Euler's equation. The equation is difficult to solve, and...

https://astarmathsandphysics.com/university-physics-notes/fluid-mechanics/1577-the-navier-stokes-equation.html
• #### The Rocket Driven Car

As a car moves, it burns fuel to overcome resistance and drive the car forward. We can apply Newton's second law of motion to find the equation of motion of the car. If the rocket engine burns up fuel at a constant rate kg/s, expelling the burnt...

https://astarmathsandphysics.com/a-level-maths-notes/m5/3684-the-rocket-driven-car.html
• #### Starting to Move

Jet engines operate by producing a hot gas and expelling it from the exhaust of the engine at high speed. The exhaust gases have a large momentum and need a large force to be exerted on them to obtain this speed. Newton's Third Law of motion then tells...

https://astarmathsandphysics.com/igcse-physics-notes/424-starting-to-move.html
• #### A Brief History of Ideas About Forces

In about 350 BC the Greek philosopher Aristotle stated without proof fall faster than light objects. Aristotle also believed that objects will only continue to move as long as forces act on them. To many people this appears to be true because because...

https://astarmathsandphysics.com/gcse-physics-notes/694-a-brief-history-of-ideas-about-forces.html
• #### Motion in a Circle

Newton's First Law states: A body continues in a state of uniform motion unless acted on by an external force. At any point on the circle below, at any point the moving body will seek to move in a tangent. To keep it moving in a circle a force must act...

https://astarmathsandphysics.com/gcse-physics-notes/779-motion-in-a-circle.html
• #### Starting to Move

Jet engines operate by producing a hot gas and expelling it from the exhaust of the engine at high speed. The exhaust gases have a large momentum and need a large force to be exerted on them to obtain this speed. Newton's Third Law of motion then tells...

https://astarmathsandphysics.com/gcse-physics-notes/822-starting-to-move.html

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