Ex. 1 - Mr. Schroeder
... Gravity accelerates all objects at the same rate, regardless of their mass. ...
... Gravity accelerates all objects at the same rate, regardless of their mass. ...
Physics (Sample Paper 1)
... greater than the weight of the student when at rest. less than the force of the floor on the student. greater than the force of the floor on the student. The answer is not certain because of insufficient information. ...
... greater than the weight of the student when at rest. less than the force of the floor on the student. greater than the force of the floor on the student. The answer is not certain because of insufficient information. ...
09 Newtons Second Law
... 1. When you push on an object, how does the magnitude of the force affect its motion? If you push harder, is the change in motion smaller or larger? Do you think this is a direct or inverse relationship? 2. Assume that you have a bowling ball and a baseball, each suspended from a different rope. If ...
... 1. When you push on an object, how does the magnitude of the force affect its motion? If you push harder, is the change in motion smaller or larger? Do you think this is a direct or inverse relationship? 2. Assume that you have a bowling ball and a baseball, each suspended from a different rope. If ...
1 Is the Binding Energy of Galaxies related to their Core
... In the case of some globular clusters like the G2 in the Andromeda galaxy, there is evidence of a ...
... In the case of some globular clusters like the G2 in the Andromeda galaxy, there is evidence of a ...
Chapter 4 Forces and Newton’s Laws of Motion continued
... A) If mass of the object is known, and all forces acting on the object are known, then the acceleration vector can be calculated. B) If the acceleration vector and mass of an object are known, then the Net Force acting on the object can be calculated. It may surprise you! C) If the acceleration vect ...
... A) If mass of the object is known, and all forces acting on the object are known, then the acceleration vector can be calculated. B) If the acceleration vector and mass of an object are known, then the Net Force acting on the object can be calculated. It may surprise you! C) If the acceleration vect ...
Semester 1 Concept Questions
... 16. Bart is taking the elevator from the first floor up to the roof. At first Bart feels heavier than he usually is, then he feels his normal weight, and then he feels lighter than he usually is. How do Newton’s laws explain this phenomenon? F=ma; Elevator is accelerating up = heavier feeling; down ...
... 16. Bart is taking the elevator from the first floor up to the roof. At first Bart feels heavier than he usually is, then he feels his normal weight, and then he feels lighter than he usually is. How do Newton’s laws explain this phenomenon? F=ma; Elevator is accelerating up = heavier feeling; down ...
Solutions to Assigned Problems Chapter 4
... © 2008 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher. ...
... © 2008 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher. ...
Scheme of work, chapter 11
... Sketch how the force versus time graph changes when, say, the impact time is increased. Lesson 11: Analyse data from one of the collisions (the disintegration is possibly the most instructive) to illustrate the principle that the change in momentum is the same for each body. Use this result to dis ...
... Sketch how the force versus time graph changes when, say, the impact time is increased. Lesson 11: Analyse data from one of the collisions (the disintegration is possibly the most instructive) to illustrate the principle that the change in momentum is the same for each body. Use this result to dis ...
HST Key Project to Measure the Hubble Constant from
... Hubble diagram of distance vs. velocity for secondary distance indicators calibrated by CVs. Velocities are corrected for the nearby flow model of Mould et al. (2000). A slope of H0=72 is shown, flanked by +-10% lines. Beyond 5000 km s-1 (vertical line), both numerical simulations and observations ...
... Hubble diagram of distance vs. velocity for secondary distance indicators calibrated by CVs. Velocities are corrected for the nearby flow model of Mould et al. (2000). A slope of H0=72 is shown, flanked by +-10% lines. Beyond 5000 km s-1 (vertical line), both numerical simulations and observations ...
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.