Chapter 3: Motion and Forces Goals of Period 3
... Newton’s Law, F = M a, tells us that the amount of acceleration of an object is proportional to the net force acting on it. From the equation, we might expect that giving an object a push with a force F would cause it to accelerate forever, since Newton’s Law does not specify the duration of the ac ...
... Newton’s Law, F = M a, tells us that the amount of acceleration of an object is proportional to the net force acting on it. From the equation, we might expect that giving an object a push with a force F would cause it to accelerate forever, since Newton’s Law does not specify the duration of the ac ...
Notes for Mid
... 30m/s when it has an acceleration of 6m/s2. How long did this take? t = (30m/s)/(6m/s2) = 5s 1) A runner’s initial speed is 5m/s and he accelerates at 5m/s2 over a distance of 7.5 meters. What is his final speed? vf2 = (5m/s)2 + 2*(5m/s2)(7.5m) = 100m2/s2 or vf = 10m/s 2) Same problem except the fin ...
... 30m/s when it has an acceleration of 6m/s2. How long did this take? t = (30m/s)/(6m/s2) = 5s 1) A runner’s initial speed is 5m/s and he accelerates at 5m/s2 over a distance of 7.5 meters. What is his final speed? vf2 = (5m/s)2 + 2*(5m/s2)(7.5m) = 100m2/s2 or vf = 10m/s 2) Same problem except the fin ...
3 Newton`s First Law of Motion—Inertia
... Answer: Two kilograms of anything has twice the inertia and twice the mass of one kilogram of anything else. In the same location, where mass and weight are proportional, two kilograms of anything will weigh twice as much as one kilogram of anything. Except for volume, the answer to all the question ...
... Answer: Two kilograms of anything has twice the inertia and twice the mass of one kilogram of anything else. In the same location, where mass and weight are proportional, two kilograms of anything will weigh twice as much as one kilogram of anything. Except for volume, the answer to all the question ...
force
... Forces acting on the object: The normal force acts perpendicular to the plane. The gravitational force acts straight down. Choose the coordinate system with x along the incline and y perpendicular to the incline. Replace the force of gravity with its components. Apply the model of a particle und ...
... Forces acting on the object: The normal force acts perpendicular to the plane. The gravitational force acts straight down. Choose the coordinate system with x along the incline and y perpendicular to the incline. Replace the force of gravity with its components. Apply the model of a particle und ...
The application of Newton Laws
... By Newton's second law, the floor of the elevator pushes upward on the boy's feet with a force of 84 lb. ...
... By Newton's second law, the floor of the elevator pushes upward on the boy's feet with a force of 84 lb. ...
Black Hole
... If the laser and detector are switched, with the laser on the ceiling of the accelerating elevator, pointing down, the detected light is blueshifted. Light emitted as the rocket begins moving upward, moves down toward a detector that is being accelerated upward toward the oncoming beam of light. Sin ...
... If the laser and detector are switched, with the laser on the ceiling of the accelerating elevator, pointing down, the detected light is blueshifted. Light emitted as the rocket begins moving upward, moves down toward a detector that is being accelerated upward toward the oncoming beam of light. Sin ...
Relativity, Space-Time And Cosmology
... There is a very important characteristic of a scientific theory or hypothesis which differentiates it from, for example, an act of faith: a theory must be “falsifiable”. This means that there must be some experiment or possible discovery that could prove the theory untrue. For example, Einstein’s th ...
... There is a very important characteristic of a scientific theory or hypothesis which differentiates it from, for example, an act of faith: a theory must be “falsifiable”. This means that there must be some experiment or possible discovery that could prove the theory untrue. For example, Einstein’s th ...
Chapter 8 solutions - University of Puget Sound
... problem sounds similar to what we encountered in Chapter 2, but here the acceleration is not constant. Instead, we will consider conservation of total mechanical energy. DEVELOP If we consider the Earth at rest as approximately an inertial system, then a vertically launched rocket would have zero ki ...
... problem sounds similar to what we encountered in Chapter 2, but here the acceleration is not constant. Instead, we will consider conservation of total mechanical energy. DEVELOP If we consider the Earth at rest as approximately an inertial system, then a vertically launched rocket would have zero ki ...
2AngDyn - TuHS Physics
... total of the parts: Children – use mr2 (assume they are points) MGR – use 1/2mr2 (solid cylinder) I = 3((40kg)(1.2m)2) + ½(240kg )(1.5m)2 I = 442.8 kgm2 = 440 kgm2 TOC ...
... total of the parts: Children – use mr2 (assume they are points) MGR – use 1/2mr2 (solid cylinder) I = 3((40kg)(1.2m)2) + ½(240kg )(1.5m)2 I = 442.8 kgm2 = 440 kgm2 TOC ...
Roller Coaster Project Write Up
... marble is going down the incline, the GPE decreases because the height is decreasing, but the speed and kinetic energy will increase. The kinetic energy is the energy an object possesses because of its motion due to its speed. The higher the starting point when going down the incline (going from A t ...
... marble is going down the incline, the GPE decreases because the height is decreasing, but the speed and kinetic energy will increase. The kinetic energy is the energy an object possesses because of its motion due to its speed. The higher the starting point when going down the incline (going from A t ...
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.