Chapter 4
... "But that's the point!", objects Old Dobbin, "If the wagon's pull is always equal and opposite of my pull, then the net force will always be zero, so the wagon can never move! Since it is at rest, it must always remain at rest! Get over here and unhitch me, since I have just proven that Newton's Law ...
... "But that's the point!", objects Old Dobbin, "If the wagon's pull is always equal and opposite of my pull, then the net force will always be zero, so the wagon can never move! Since it is at rest, it must always remain at rest! Get over here and unhitch me, since I have just proven that Newton's Law ...
Document
... Center of Mass: the center of mass of an object is the point in an object that moves in the same way that a point particle would move. Said another way, the center of mass of an object is the point in an object where the mass appears to be located. Imagine throwing a hammer. Unlike a baseball which ...
... Center of Mass: the center of mass of an object is the point in an object that moves in the same way that a point particle would move. Said another way, the center of mass of an object is the point in an object where the mass appears to be located. Imagine throwing a hammer. Unlike a baseball which ...
Higher Unit 1
... Describe what is meant by vector and scalar quantities State the difference between distance and displacement State the difference between speed and velocity State that force is a vector quantity Use a scale diagram to find the magnitude and direction of the resultant of two forces acting at right a ...
... Describe what is meant by vector and scalar quantities State the difference between distance and displacement State the difference between speed and velocity State that force is a vector quantity Use a scale diagram to find the magnitude and direction of the resultant of two forces acting at right a ...
Item #
... How do you think about the students’ reasoning? “Force is calculated my multiplying mass by acceleration. If both the truck and the car are traveling at the same acceleration than the only way for the force to not be equal is find which has the larger mass.” “Since a=F/m, and they are traveling at t ...
... How do you think about the students’ reasoning? “Force is calculated my multiplying mass by acceleration. If both the truck and the car are traveling at the same acceleration than the only way for the force to not be equal is find which has the larger mass.” “Since a=F/m, and they are traveling at t ...
Ch 6 ppt
... • Force Pairs Do Not Act on the Same Object A force is always exerted by one object on another object. This rule is true for all forces, including action and reaction forces. • Action and reaction forces in a pair do not act on the same object. If they did, the net force would always be 0 N and noth ...
... • Force Pairs Do Not Act on the Same Object A force is always exerted by one object on another object. This rule is true for all forces, including action and reaction forces. • Action and reaction forces in a pair do not act on the same object. If they did, the net force would always be 0 N and noth ...
Stars and Galaxies - La Salle Elementary Public Schools No 122
... • When a star’s hydrogen supply is nearly gone, the star leaves the main sequence and begins the next stage of its life cycle. • All stars form in the same way, but stars die in different ways, depending on their masses. ...
... • When a star’s hydrogen supply is nearly gone, the star leaves the main sequence and begins the next stage of its life cycle. • All stars form in the same way, but stars die in different ways, depending on their masses. ...
-- Torque -- Kinetic energy potential energy mechanical energy for
... attached to a cord passing through a hole in the surface as in the figure. The puck is revolving at a distance 2.0 m from the hole with an angular velocity of 3.0 rad/s. The cord is then pulled from below shortening the radius to 1.0 ...
... attached to a cord passing through a hole in the surface as in the figure. The puck is revolving at a distance 2.0 m from the hole with an angular velocity of 3.0 rad/s. The cord is then pulled from below shortening the radius to 1.0 ...
Text Chapter 3.4
... time. When you push a door open, the door pushes back on you. When you walk forward across the floor, you push backwards on the ground and the ground pushes forward on you. In fact, whenever one object exerts a force on another, the second object exerts another force back. Another simple way to demo ...
... time. When you push a door open, the door pushes back on you. When you walk forward across the floor, you push backwards on the ground and the ground pushes forward on you. In fact, whenever one object exerts a force on another, the second object exerts another force back. Another simple way to demo ...
Laws of Motion - physics teacher
... We have studied in the previous chapters, the motion of bodies loving with uniform, acceleration without taking into account the srnal factors that produced the acceleration. For centuries the problem of motion and its causes were a cen-|tral theme of natural philosophy. The Greek philosopher Ari_ _ ...
... We have studied in the previous chapters, the motion of bodies loving with uniform, acceleration without taking into account the srnal factors that produced the acceleration. For centuries the problem of motion and its causes were a cen-|tral theme of natural philosophy. The Greek philosopher Ari_ _ ...
Forces - 1D chap 5
... What Newton was really saying… Greater net forces cause greater accelerations Greater masses require greater net forces to accelerate at equal rates Greater accelerations can occur if an object is smaller ...
... What Newton was really saying… Greater net forces cause greater accelerations Greater masses require greater net forces to accelerate at equal rates Greater accelerations can occur if an object is smaller ...
ALMA_BoJun605_Gruppioni
... • COBE found slightly higher luminosities in higher transitions (Bennett et al 1994) → adopt L’co = 5x108 K km s-1pc2. • At z=3 → observe (3-2) or (4-3) transition in the 84-116 GHz atmospheric band → need to correct, but also higher TCMB providing higher background levels for CO excitation. • Diffe ...
... • COBE found slightly higher luminosities in higher transitions (Bennett et al 1994) → adopt L’co = 5x108 K km s-1pc2. • At z=3 → observe (3-2) or (4-3) transition in the 84-116 GHz atmospheric band → need to correct, but also higher TCMB providing higher background levels for CO excitation. • Diffe ...
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.