Introduction to Classical Mechanics 1 HISTORY
... There are only a few basic forces in nature: gravitational, electric and magnetic, and nuclear. All observed forces (e.g., contact, friction, a spring, atomic forces, etc.) are produced in some way by those basic forces. Whatever force is acting on an object, (2-22) states how that force influences ...
... There are only a few basic forces in nature: gravitational, electric and magnetic, and nuclear. All observed forces (e.g., contact, friction, a spring, atomic forces, etc.) are produced in some way by those basic forces. Whatever force is acting on an object, (2-22) states how that force influences ...
1 Fig. 1.1 shows the speed-time graph for the first 125 s of the
... (ii) The gas in the cylinder starts at a pressure of 1.0 105 Pa and has a volume of100 cm3. The volume of the gas decreases to 80 cm3. Calculate the final pressure of the gas. State the formula that you use. ...
... (ii) The gas in the cylinder starts at a pressure of 1.0 105 Pa and has a volume of100 cm3. The volume of the gas decreases to 80 cm3. Calculate the final pressure of the gas. State the formula that you use. ...
forces and motion notes
... Newton’s First Law of Motion continued • Inertia and Newton’s First Law Newton’s first law of motion is sometimes called the law of inertia. Inertia is the tendency of all objects to resist any change in motion. ...
... Newton’s First Law of Motion continued • Inertia and Newton’s First Law Newton’s first law of motion is sometimes called the law of inertia. Inertia is the tendency of all objects to resist any change in motion. ...
Chapter 8: Rotational motion
... More about rotational inertia: rolling objects down a hill… • Which rolls to the bottom of an incline first, a solid ball, a solid cylinder or a ring? First ask: which has smallest rotational inertia? – since this will resist rolling the least, so will reach the bottom first. The shape which has mo ...
... More about rotational inertia: rolling objects down a hill… • Which rolls to the bottom of an incline first, a solid ball, a solid cylinder or a ring? First ask: which has smallest rotational inertia? – since this will resist rolling the least, so will reach the bottom first. The shape which has mo ...
UNIT 2 GCSE PHYSICS 2.1.4 Forces and
... As the object’s velocity increases, an increasing upward drag force acts on it. This causes the resultant force to decrease and so the object’s acceleration decreases (shown by the fact that the gradient of the velocity-time graph decreases). Eventually, when the terminal velocity is reached, the dr ...
... As the object’s velocity increases, an increasing upward drag force acts on it. This causes the resultant force to decrease and so the object’s acceleration decreases (shown by the fact that the gradient of the velocity-time graph decreases). Eventually, when the terminal velocity is reached, the dr ...
Newton`s Laws of Motion
... In this part of the experiment you will investigate Hooke’s Law, which quantitatively describes the behavior of a spring as a force is applied to either stretch or compress the spring. 1. To do this, use the provided clamp to suspend the spring from the ring stand on your table. Hang the mass hanger ...
... In this part of the experiment you will investigate Hooke’s Law, which quantitatively describes the behavior of a spring as a force is applied to either stretch or compress the spring. 1. To do this, use the provided clamp to suspend the spring from the ring stand on your table. Hang the mass hanger ...
Experiment 5U: Kinetic Friction
... In this experiment, a block of mass M is placed on a level surface. A string connects the block to a mass m hanging over a pulley. Gravity exerts a force on mass m which is transferred to block M through the tension in the string. When released, the block will slide across the surface as the hanging ...
... In this experiment, a block of mass M is placed on a level surface. A string connects the block to a mass m hanging over a pulley. Gravity exerts a force on mass m which is transferred to block M through the tension in the string. When released, the block will slide across the surface as the hanging ...
Forces and Motion
... Special Applications of Newton’s Laws Weight and Friction Weight – The force between too bodies, usually between a large mass and a much smaller mass Weight is not an inherent property of an object (like mass or inertia) but is location dependent The farther an object is from the center of the mass ...
... Special Applications of Newton’s Laws Weight and Friction Weight – The force between too bodies, usually between a large mass and a much smaller mass Weight is not an inherent property of an object (like mass or inertia) but is location dependent The farther an object is from the center of the mass ...
determination of the acceleration of an elevator.
... In order for an object to accelerate, there must be a net force acting on it. We know that the direction of the acceleration will be in the same direction as the direction of the net force. The equation for Newton’s 2nd law is F = ma or a = F/m. Today we will be looking at the acceleration of an e ...
... In order for an object to accelerate, there must be a net force acting on it. We know that the direction of the acceleration will be in the same direction as the direction of the net force. The equation for Newton’s 2nd law is F = ma or a = F/m. Today we will be looking at the acceleration of an e ...
Small Wonders: Canes Venatici
... on by both Ursa Major and Bootes, Canes is located in a somewhat barren section of the night sky. Canes (whose name means The Hunting Dogs) has been seen as Bootes pets for at least several hundred years, but the constellation may not have been "stand alone" until sometime in the late 17th century w ...
... on by both Ursa Major and Bootes, Canes is located in a somewhat barren section of the night sky. Canes (whose name means The Hunting Dogs) has been seen as Bootes pets for at least several hundred years, but the constellation may not have been "stand alone" until sometime in the late 17th century w ...
Modified Newtonian dynamics
In physics, modified Newtonian dynamics (MOND) is a theory that proposes a modification of Newton's laws to account for observed properties of galaxies. Created in 1983 by Israeli physicist Mordehai Milgrom, the theory's original motivation was to explain the fact that the velocities of stars in galaxies were observed to be larger than expected based on Newtonian mechanics. Milgrom noted that this discrepancy could be resolved if the gravitational force experienced by a star in the outer regions of a galaxy was proportional to the square of its centripetal acceleration (as opposed to the centripetal acceleration itself, as in Newton's Second Law), or alternatively if gravitational force came to vary inversely with radius (as opposed to the inverse square of the radius, as in Newton's Law of Gravity). In MOND, violation of Newton's Laws occurs at extremely small accelerations, characteristic of galaxies yet far below anything typically encountered in the Solar System or on Earth.MOND is an example of a class of theories known as modified gravity, and is an alternative to the hypothesis that the dynamics of galaxies are determined by massive, invisible dark matter halos. Since Milgrom's original proposal, MOND has successfully predicted a variety of galactic phenomena that are difficult to understand from a dark matter perspective. However, MOND and its generalisations do not adequately account for observed properties of galaxy clusters, and no satisfactory cosmological model has been constructed from the theory.