Newton`s Laws Recap Newton`s 1st Law 1. What is Newton`s 1 st law
... 1. Two bricks are resting on edge of the lab table. Shirley Short stands on her toes and spots the two bricks. She acquires an intense desire to know which of the two bricks are most massive. Since Shirley is vertically challenged, she is unable to reach high enough and lift the bricks; she can howe ...
... 1. Two bricks are resting on edge of the lab table. Shirley Short stands on her toes and spots the two bricks. She acquires an intense desire to know which of the two bricks are most massive. Since Shirley is vertically challenged, she is unable to reach high enough and lift the bricks; she can howe ...
ppt
... “By reason of the deviation of the Sun from the center of gravity, the centripetal force does not always tend to that immobile center, and hence the planets neither move exactly in ellipses nor revolve twice in the same orbit. There are as many orbits of a planet as it has revolutions, as in the mot ...
... “By reason of the deviation of the Sun from the center of gravity, the centripetal force does not always tend to that immobile center, and hence the planets neither move exactly in ellipses nor revolve twice in the same orbit. There are as many orbits of a planet as it has revolutions, as in the mot ...
Newton`s Second Law: Acceleration
... Newton’s Second Law: Acceleration • The combination of all forces acting on an object is called the net force. • Acceleration depends on the net force. • To increase the acceleration of an object, you must increase the net force acting on it. • An object’s acceleration is directly proportional to t ...
... Newton’s Second Law: Acceleration • The combination of all forces acting on an object is called the net force. • Acceleration depends on the net force. • To increase the acceleration of an object, you must increase the net force acting on it. • An object’s acceleration is directly proportional to t ...
force
... What about the ladder on top of the truck? The ladder is in motion because the truck is in motion. When the truck stops, the ladder stays in motion. The truck is stopped by the force of the car, but the ladder is not. What force makes the ladder fall while it is moving ...
... What about the ladder on top of the truck? The ladder is in motion because the truck is in motion. When the truck stops, the ladder stays in motion. The truck is stopped by the force of the car, but the ladder is not. What force makes the ladder fall while it is moving ...
ppt
... • In the absence of air resistance, all objects accelerate towards Earth at the same rate. • We call this “free-fall” acceleration- meaning gravity is the only force acting on an object. • Because we use this value so often we’ll give it a name- g • What do you think g depends on? ...
... • In the absence of air resistance, all objects accelerate towards Earth at the same rate. • We call this “free-fall” acceleration- meaning gravity is the only force acting on an object. • Because we use this value so often we’ll give it a name- g • What do you think g depends on? ...
Newton PowerPoint
... • After the ball is kicked, what forces are acting on it while it rolls? • What if we could remove those forces? What would happen then if we kicked the ball? GRAVITY ...
... • After the ball is kicked, what forces are acting on it while it rolls? • What if we could remove those forces? What would happen then if we kicked the ball? GRAVITY ...
Circular Motion & Gravity
... Gravitation • Gravitational force is… – directly proportional to the product of the masses of the two bodies – inversely proportional to the square of the distance between the centers of the two masses – If the objects are large (e.g. planets, moons) then the radii would be included in r ...
... Gravitation • Gravitational force is… – directly proportional to the product of the masses of the two bodies – inversely proportional to the square of the distance between the centers of the two masses – If the objects are large (e.g. planets, moons) then the radii would be included in r ...
PHYS4330 Theoretical Mechanics HW #8 Due 25 Oct 2011
... B = Bẑ. Prove that B = ∇ × A where A = 12 B × r. (You can do this in a coordinateindependent way, only assuming that B is a constant field, and using some vector identities.) Show that A = 12 Bρφ̂ in cylindrical polar coordinates. Write the Lagrangian in cylindrical polar coordinates and find the t ...
... B = Bẑ. Prove that B = ∇ × A where A = 12 B × r. (You can do this in a coordinateindependent way, only assuming that B is a constant field, and using some vector identities.) Show that A = 12 Bρφ̂ in cylindrical polar coordinates. Write the Lagrangian in cylindrical polar coordinates and find the t ...
Gravitational Interactions
... • What would a scale read (higher or lower than normal) if your were on an elevator: – Accelerating up? • Higher! ...
... • What would a scale read (higher or lower than normal) if your were on an elevator: – Accelerating up? • Higher! ...
Part I
... Newton’s First Law • 1st Law: (“Law of Inertia”): “In the absence of external forces and when viewed from an inertial reference frame, an object at rest remains at rest and an object in motion remains in motion with a constant velocity (constant speed in a straight line).” Sir Isaac Newton as an ...
... Newton’s First Law • 1st Law: (“Law of Inertia”): “In the absence of external forces and when viewed from an inertial reference frame, an object at rest remains at rest and an object in motion remains in motion with a constant velocity (constant speed in a straight line).” Sir Isaac Newton as an ...
Day - Hamelinck
... When a soccer player kicks a ball on the ground, the horizontal forces acting on the ball are the applied push force, friction with the ground and air resistance. As long as the applied push force is greater in magnitude than the sum of the forces of friction and air resistance acting on the ball, t ...
... When a soccer player kicks a ball on the ground, the horizontal forces acting on the ball are the applied push force, friction with the ground and air resistance. As long as the applied push force is greater in magnitude than the sum of the forces of friction and air resistance acting on the ball, t ...
Newton’s 2nd Law of Motion
... 1. Static friction-friction that occurs between things that are not moving 2. Sliding friction-friction that occurs when one object is sliding over another object 3. Rolling friction-friction that occurs when one object is rolling over another object ...
... 1. Static friction-friction that occurs between things that are not moving 2. Sliding friction-friction that occurs when one object is sliding over another object 3. Rolling friction-friction that occurs when one object is rolling over another object ...
4.1 Force
... matter in a body. It is better used as a measure of the inertia of a body. The larger the mass, the larger is the force required to give it with a particular acceleration. • Units of m? in the SI system the unit of mass is the kilogram – kg. • Note that mass and weight are distinct quantities L7-s7, ...
... matter in a body. It is better used as a measure of the inertia of a body. The larger the mass, the larger is the force required to give it with a particular acceleration. • Units of m? in the SI system the unit of mass is the kilogram – kg. • Note that mass and weight are distinct quantities L7-s7, ...
Concepts and Skills
... distance between the earth and the moon. Because the moon's orbit is close to being circular (remember orbits tend to be elliptical, though usually with very low eccentricities) it is logical to think that the earth's gravitational acceleration at a distance equal to the average of the moon's orbit' ...
... distance between the earth and the moon. Because the moon's orbit is close to being circular (remember orbits tend to be elliptical, though usually with very low eccentricities) it is logical to think that the earth's gravitational acceleration at a distance equal to the average of the moon's orbit' ...
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.