unit 21: electrical and gravitational potential
... It takes work to lift an object in the earth's gravitational field. Lowering the object releases the energy that was stored as potential energy when it was lifted. Last semester, we applied the term conservative to the gravitational force because it "releases" all of the stored energy. We found expe ...
... It takes work to lift an object in the earth's gravitational field. Lowering the object releases the energy that was stored as potential energy when it was lifted. Last semester, we applied the term conservative to the gravitational force because it "releases" all of the stored energy. We found expe ...
Categories
... Newton’s Laws of Motion 500 Points If a force of 25 Newtons is applied to all 3 of the objects below, which one will have the most acceleration? Why? ...
... Newton’s Laws of Motion 500 Points If a force of 25 Newtons is applied to all 3 of the objects below, which one will have the most acceleration? Why? ...
Mechanics II - Thierry Karsenti
... The second activity is the kinematic and dynamic descriptions of rotational motion. New quantities to describe rotational motion are introduced and used. It will be show that the equations of motion that describe linear motion possess a rotational counterpart. The third activity is on Gravitation Up ...
... The second activity is the kinematic and dynamic descriptions of rotational motion. New quantities to describe rotational motion are introduced and used. It will be show that the equations of motion that describe linear motion possess a rotational counterpart. The third activity is on Gravitation Up ...
Document
... • Combining these conclusions, we can write Newton’s law of gravity for two objects of mass m1 and m2 separated by a distance r: FG21 = FG12 ∝ m1m2 /r2 Why m1m2 ? doubling either mass should double the force Why 1/r2 ? interaction spreads out over surface area Other laws possible, but not consistent ...
... • Combining these conclusions, we can write Newton’s law of gravity for two objects of mass m1 and m2 separated by a distance r: FG21 = FG12 ∝ m1m2 /r2 Why m1m2 ? doubling either mass should double the force Why 1/r2 ? interaction spreads out over surface area Other laws possible, but not consistent ...
Forces - RIO Commons
... resistance. The weight vector stays constant, while the air resistance vector keeps increasing until it has the same magnitude as the weight vector. When these two vectors are equal in magnitude, the net force is zero, and the box continues to fall at a final constant velocity. The acceleration is t ...
... resistance. The weight vector stays constant, while the air resistance vector keeps increasing until it has the same magnitude as the weight vector. When these two vectors are equal in magnitude, the net force is zero, and the box continues to fall at a final constant velocity. The acceleration is t ...
massachusetts institute of technology
... time, there would be some slowing down of the acrobat A during the collision. then we need to calculate this effect. However by assuming the collision is instantaneous, we can ignore this slowing down, and therefore the change in the system momentum is zero. From one-dimensional kinematics, the y-co ...
... time, there would be some slowing down of the acrobat A during the collision. then we need to calculate this effect. However by assuming the collision is instantaneous, we can ignore this slowing down, and therefore the change in the system momentum is zero. From one-dimensional kinematics, the y-co ...
Instructor Solution Manual
... 13.13. Model: Model Jupiter as a spherical mass and the object as a point particle. The object and Jupiter form an isolated system, so mechanical energy is conserved. The minimum launch speed for escape, which is called the escape speed, allows an object to escape to an infinite distance from Jupite ...
... 13.13. Model: Model Jupiter as a spherical mass and the object as a point particle. The object and Jupiter form an isolated system, so mechanical energy is conserved. The minimum launch speed for escape, which is called the escape speed, allows an object to escape to an infinite distance from Jupite ...
Lecture 12: Evolution of the Galaxy
... the ages of stars in clusters from their HR diagrams. The metallicity increased rapidly in the first few × 108 yr, but only slowly thereafter. ...
... the ages of stars in clusters from their HR diagrams. The metallicity increased rapidly in the first few × 108 yr, but only slowly thereafter. ...
Systems of particles
... So far, we have discussed only the application of Newton’s laws to particles, or to bodies in situations where they can be treated as particles — planets in orbit round the Sun, for example. In this chapter, we apply Newton’s laws to systems of interacting particles, which could be as simple as two ...
... So far, we have discussed only the application of Newton’s laws to particles, or to bodies in situations where they can be treated as particles — planets in orbit round the Sun, for example. In this chapter, we apply Newton’s laws to systems of interacting particles, which could be as simple as two ...
WS 2 – Uniform Circular Motion - Physics `10-`
... 9. A runner rounds a circular curve of radius 24.0 m at a constant speed of 5.25 m/s. What is the magnitude of the runner's centripetal acceleration? 10. An astronaut in training rides in a seat that is moved in uniform circular motion by a radial arm 5.10 meters long. If her speed is 15.0 m/s, what ...
... 9. A runner rounds a circular curve of radius 24.0 m at a constant speed of 5.25 m/s. What is the magnitude of the runner's centripetal acceleration? 10. An astronaut in training rides in a seat that is moved in uniform circular motion by a radial arm 5.10 meters long. If her speed is 15.0 m/s, what ...
instructor notes: weeks 9/10
... spiral arms from any elongated structure in a disk-dominated galaxy: differential rotation in the disk naturally stretches such features into spiral arms. Note that 2-armed spirals appear to be most common. ...
... spiral arms from any elongated structure in a disk-dominated galaxy: differential rotation in the disk naturally stretches such features into spiral arms. Note that 2-armed spirals appear to be most common. ...
Stellar populations
... The locus of stars which have just started to shine • Subgiant branch Stars that have just exhausted H in their cores, and are now moving off the main sequence • Red giants Evolved stars in upper right-hand part of diagram with either He cores, or they are burning He to C and O in their cores. They ...
... The locus of stars which have just started to shine • Subgiant branch Stars that have just exhausted H in their cores, and are now moving off the main sequence • Red giants Evolved stars in upper right-hand part of diagram with either He cores, or they are burning He to C and O in their cores. They ...
K E N D
... There are four fundamental forces in nature that govern the diverse phenomena of the macroscopic and the microscopic world. These are the ‘gravitational force ‘, the electromagnetic force’, ‘the strong nuclear force’, and the weak nuclear force’ The physical quantities that remain unchanged in a ...
... There are four fundamental forces in nature that govern the diverse phenomena of the macroscopic and the microscopic world. These are the ‘gravitational force ‘, the electromagnetic force’, ‘the strong nuclear force’, and the weak nuclear force’ The physical quantities that remain unchanged in a ...
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.