Multiple Choice
... The planet Saturn is moving in the negative x-direction at its orbital speed (with respect to the Sun) of 9.6 km/s. The mass of Saturn is 5.69x1026 kg. A 2150 kg spacecraft approaches Saturn, moving initially in the +x-direction at 10.4 km/s. The gravitational attraction of Saturn (a conservative fo ...
... The planet Saturn is moving in the negative x-direction at its orbital speed (with respect to the Sun) of 9.6 km/s. The mass of Saturn is 5.69x1026 kg. A 2150 kg spacecraft approaches Saturn, moving initially in the +x-direction at 10.4 km/s. The gravitational attraction of Saturn (a conservative fo ...
Solutions Chapter 12
... 12.30. Model: The rocket attached to the end of a rigid rod is a rotating rigid body. Assume the rocket is small compared to 60 cm. Visualize: Please refer to Figure EX12.30. Solve: We can determine the rocket’s angular acceleration from the relationship τ = Iα . The torque τ can be found from the t ...
... 12.30. Model: The rocket attached to the end of a rigid rod is a rotating rigid body. Assume the rocket is small compared to 60 cm. Visualize: Please refer to Figure EX12.30. Solve: We can determine the rocket’s angular acceleration from the relationship τ = Iα . The torque τ can be found from the t ...
A Zoo of Galaxies - Portsmouth Research Portal
... To say our understanding of the “zoo” of galaxies that are found in our Universe has changed a lot over the last century or two is a bit of an understatement. In 1845 the state of the art picture of an external galaxy, was an image of M51, or the Whirlpool galaxy drawn by William Parsons, Third Earl ...
... To say our understanding of the “zoo” of galaxies that are found in our Universe has changed a lot over the last century or two is a bit of an understatement. In 1845 the state of the art picture of an external galaxy, was an image of M51, or the Whirlpool galaxy drawn by William Parsons, Third Earl ...
GRAVITY: Observing the Universe in Motion
... with the Very Large Telescope Interferometer (VLTI) substantially. An overview of the key experiments that will become possible with GRAVITY is illustrated on the Telescopes and Instrumentation section page (p. 6, lower panel). A unique combination with the VLTI The VLTI is the largest array of 8-me ...
... with the Very Large Telescope Interferometer (VLTI) substantially. An overview of the key experiments that will become possible with GRAVITY is illustrated on the Telescopes and Instrumentation section page (p. 6, lower panel). A unique combination with the VLTI The VLTI is the largest array of 8-me ...
GOVIND VIDYALAYA TAMULIA
... 39. Prove that the maximum horizontal range is four times the maximum height attained by the projectile, when fired at an inclination so as to have maximum range. 40. Show that there are two values of time for which a projectile is at the same height. Also show that the sum of these two times is eq ...
... 39. Prove that the maximum horizontal range is four times the maximum height attained by the projectile, when fired at an inclination so as to have maximum range. 40. Show that there are two values of time for which a projectile is at the same height. Also show that the sum of these two times is eq ...
11 1. PURPOSE The purpose of this experiment is to use the force
... 1. The knot should be centered over the hole in the middle of the center post when the system is in equilibrium. The anchor string should be slack. Adjust the pulleys downward until the strings are close to the top surface of the force table. Pull the knot slightly to one side and let it go. Check t ...
... 1. The knot should be centered over the hole in the middle of the center post when the system is in equilibrium. The anchor string should be slack. Adjust the pulleys downward until the strings are close to the top surface of the force table. Pull the knot slightly to one side and let it go. Check t ...
Table of Contents
... Newton’s third law simply says that forces come in pairs. You push on a wall and the wall pushes on you. We call these action/reaction force pairs. One of the skills most people master is walking. We rarely think about the act of walking – you don’t have to concentrate on it, it’s just something tha ...
... Newton’s third law simply says that forces come in pairs. You push on a wall and the wall pushes on you. We call these action/reaction force pairs. One of the skills most people master is walking. We rarely think about the act of walking – you don’t have to concentrate on it, it’s just something tha ...
Document
... particles make one revolution in the same amount of time. i.e., they all have the same angular speed. Moment of Inertia: A rigid body rotating about a fixed axis AB, a particle 'p' of mass is rotating in a circle of radius 'r'. Law of conservation of angular momentum: The total angular momentum of ...
... particles make one revolution in the same amount of time. i.e., they all have the same angular speed. Moment of Inertia: A rigid body rotating about a fixed axis AB, a particle 'p' of mass is rotating in a circle of radius 'r'. Law of conservation of angular momentum: The total angular momentum of ...
Chapter 14 - Oscillations w./ QuickCheck Questions
... For fluid dynamics we use a simplified model of an ideal fluid. We assume 3. The fluid is nonviscous. Water flows much more easily than cold pancake syrup because the syrup is a very viscous liquid. Viscosity is resistance to flow, and assuming a fluid is nonviscous is analogous to assuming the moti ...
... For fluid dynamics we use a simplified model of an ideal fluid. We assume 3. The fluid is nonviscous. Water flows much more easily than cold pancake syrup because the syrup is a very viscous liquid. Viscosity is resistance to flow, and assuming a fluid is nonviscous is analogous to assuming the moti ...
form 4- 32 circular motion - kcpe-kcse
... Jess will remain in contact with the van’s roof as long as the reaction force, R is greater than zero. The resultant force, ΣF downwards on Jess, while the van passes over the bridge, is centripetal and is given by: ΣF = mg - R and so: m v2 / r = mg - R The maximum speed is when R = 0 and so: m v2 / ...
... Jess will remain in contact with the van’s roof as long as the reaction force, R is greater than zero. The resultant force, ΣF downwards on Jess, while the van passes over the bridge, is centripetal and is given by: ΣF = mg - R and so: m v2 / r = mg - R The maximum speed is when R = 0 and so: m v2 / ...
term-exam2-keys - UTA HEP WWW Home Page
... 1. What force is needed to make an object move in a circle? a) kinetic friction b) static friction c) centripetal force d) weight 2. How many revolutions per minute must a circular, rotating spacestation of radius 1000 m rotate to produce an artificial gravity of 9.80 m/s2? a) 0.65 rpm b) 0.75 rpm c ...
... 1. What force is needed to make an object move in a circle? a) kinetic friction b) static friction c) centripetal force d) weight 2. How many revolutions per minute must a circular, rotating spacestation of radius 1000 m rotate to produce an artificial gravity of 9.80 m/s2? a) 0.65 rpm b) 0.75 rpm c ...
Concept review
... When the fly hit the truck, it exerted a force on the truck (only for a fraction of a second). So, in this time period, the truck accelerated (backwards) up to some speed. After the fly was squashed, it no longer exerted a force, and the truck simply continued moving at constant speed. Follow-up: Wh ...
... When the fly hit the truck, it exerted a force on the truck (only for a fraction of a second). So, in this time period, the truck accelerated (backwards) up to some speed. After the fly was squashed, it no longer exerted a force, and the truck simply continued moving at constant speed. Follow-up: Wh ...
Edexcel AS/A level Physics Student Book 1
... through this without change. The third Polaroid filter is oriented horizontally. This blocks vertically polarised light, and so no waves are transmitted beyond it. The second and third filters are referred to as ‘crossed Polaroids’, as their orientations are at right angles and, together, they will ...
... through this without change. The third Polaroid filter is oriented horizontally. This blocks vertically polarised light, and so no waves are transmitted beyond it. The second and third filters are referred to as ‘crossed Polaroids’, as their orientations are at right angles and, together, they will ...
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.