Circular Motion
... be a force acting on it. ● This agrees with Newton’s Second Law, that a net force results in acceleration. ○ If there were no forces involved, the object should be moving at a constant speed in a straight line (Newton's First Law), which it isn’t. ● Since the acceleration points to the centre, the f ...
... be a force acting on it. ● This agrees with Newton’s Second Law, that a net force results in acceleration. ○ If there were no forces involved, the object should be moving at a constant speed in a straight line (Newton's First Law), which it isn’t. ● Since the acceleration points to the centre, the f ...
Export To Word
... 1. Conservation of linear momentum: Conservation laws play an extremely important role in many aspects of physics. The idea that a certain property of a system is maintained before and after something happens is quite central to many principles in physics. In the pool example, we concentrate on the ...
... 1. Conservation of linear momentum: Conservation laws play an extremely important role in many aspects of physics. The idea that a certain property of a system is maintained before and after something happens is quite central to many principles in physics. In the pool example, we concentrate on the ...
Conference Summary Richard Ellis (Caltech) ITALIA
... Galaxy Formation Issues • Do we have a complete census of star formation activity and baryon content at all epochs? - key role of multi-wavelength techniques • How did the Hubble Sequence emerge at z<1 from the varied active and irregular sources at z > 2? What are the physical processes involved? ...
... Galaxy Formation Issues • Do we have a complete census of star formation activity and baryon content at all epochs? - key role of multi-wavelength techniques • How did the Hubble Sequence emerge at z<1 from the varied active and irregular sources at z > 2? What are the physical processes involved? ...
Potential Energy - McMaster University
... A 4m length of nylon cord is wound around a solid cylinder of radius 0.5m and 1.0kg mass. The cylinder is mounted on a frictionless axle and is initially at rest. The cord is pulled with a=2.5m/s2. a) how much work has been done on the cylinder if it reaches ...
... A 4m length of nylon cord is wound around a solid cylinder of radius 0.5m and 1.0kg mass. The cylinder is mounted on a frictionless axle and is initially at rest. The cord is pulled with a=2.5m/s2. a) how much work has been done on the cylinder if it reaches ...
Forces and Motion
... Newton’s First Law of Motion states that objects do not change their motion unless forced to do so. “An object at rest tends to stay at rest, and an object in constant motion tends to stay in motion, unless acted upon by an unbalanced force.” It is sometimes referred to as the law of inertia. This l ...
... Newton’s First Law of Motion states that objects do not change their motion unless forced to do so. “An object at rest tends to stay at rest, and an object in constant motion tends to stay in motion, unless acted upon by an unbalanced force.” It is sometimes referred to as the law of inertia. This l ...
Forces Test I
... _____ 20. If an object is in physical equilibrium, the net force on the object must be zero. _____ 21. If the net force on an object is zero, it must be at rest. _____ 22. Any object with zero acceleration must have a constant velocity. _____ 23. Any object with zero acceleration must be at rest. __ ...
... _____ 20. If an object is in physical equilibrium, the net force on the object must be zero. _____ 21. If the net force on an object is zero, it must be at rest. _____ 22. Any object with zero acceleration must have a constant velocity. _____ 23. Any object with zero acceleration must be at rest. __ ...
PHYS2330 Intermediate Mechanics Fall 2009 Final Exam
... 5. For a system with n degrees of freedom, we can define a 2n-dimensional “space” out of the generalized coordinates and their conjugate momenta. We proved a theorem about the “volume” in this space. In particular, we found that this volume A. is always zero. B. can be written in terms of a strain ...
... 5. For a system with n degrees of freedom, we can define a 2n-dimensional “space” out of the generalized coordinates and their conjugate momenta. We proved a theorem about the “volume” in this space. In particular, we found that this volume A. is always zero. B. can be written in terms of a strain ...
Lecture 16 - Circular Motion
... the same ideas of kinematics (x, v, a) and Newton’s Laws of motion that we have been studying, but we will apply them to situations involving motion in circles. A new word in involved: Centripetal. This just means directed towards the center. A centripetal acceleration is one directed towards the ce ...
... the same ideas of kinematics (x, v, a) and Newton’s Laws of motion that we have been studying, but we will apply them to situations involving motion in circles. A new word in involved: Centripetal. This just means directed towards the center. A centripetal acceleration is one directed towards the ce ...
3-3 Constant Velocity, Acceleration, and Force
... an object of mass m and measure the acceleration , the acceleration turns out to be given by: (Equation 3.1: Connecting acceleration and force) The symbol ! represents a sum, so ...
... an object of mass m and measure the acceleration , the acceleration turns out to be given by: (Equation 3.1: Connecting acceleration and force) The symbol ! represents a sum, so ...
AP C UNIT 4 - student handout
... constant, then acm = 0. Consequently, angular acceleration is zero and the net torque is zero. Thus, no net torque is needed to maintain rolling without slipping at constant speed. (angular momentum is enough to keep object turning) ...
... constant, then acm = 0. Consequently, angular acceleration is zero and the net torque is zero. Thus, no net torque is needed to maintain rolling without slipping at constant speed. (angular momentum is enough to keep object turning) ...
Sample
... Topic: Newton's 1st Law 15) Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to A) continue to follow a circular path. B) follow a straight-line path. C) increase its speed. D) revolve in a smaller circle. Answer: B Diff: 1 Topic: ...
... Topic: Newton's 1st Law 15) Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to A) continue to follow a circular path. B) follow a straight-line path. C) increase its speed. D) revolve in a smaller circle. Answer: B Diff: 1 Topic: ...
2.2.1 In Class or Homework Exercise 1. If you are in a car that is
... Newton’s Third Law there would be an equal force backwards. Thus, there would be balanced forces and, according to Newton’s Second Law, the cart would not accelerate. How would you reason with this rather weird horse? Although there is an equal force backwards, the two forces are acting on different ...
... Newton’s Third Law there would be an equal force backwards. Thus, there would be balanced forces and, according to Newton’s Second Law, the cart would not accelerate. How would you reason with this rather weird horse? Although there is an equal force backwards, the two forces are acting on different ...
Momentum
... concept of inertia and how it is a measure of an object’s desire to resist movement. It was a product of its mass. • Momentum is moving inertia. It is a product of not only an objects mass but also how fast it is moving (velocity) • Newton’s 1st law rewritten to include momentum • An object that is ...
... concept of inertia and how it is a measure of an object’s desire to resist movement. It was a product of its mass. • Momentum is moving inertia. It is a product of not only an objects mass but also how fast it is moving (velocity) • Newton’s 1st law rewritten to include momentum • An object that is ...
Sample
... Topic: Newton's 1st Law 15) Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to A) continue to follow a circular path. B) follow a straight-line path. C) increase its speed. D) revolve in a smaller circle. Answer: B Diff: 1 Topic: ...
... Topic: Newton's 1st Law 15) Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to A) continue to follow a circular path. B) follow a straight-line path. C) increase its speed. D) revolve in a smaller circle. Answer: B Diff: 1 Topic: ...
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.