Slide 1
... clusters including Local Grp. We are falling toward Virgo Cluster, which has three supergiant ellipticals (M87 contains accretion disk indicating BH or WH in center--a quadrillion solar masses!) The Pisces-Cetus Complex: may include 400 rich (and lots of poor) clusters. Brent Tully. Is the Universe ...
... clusters including Local Grp. We are falling toward Virgo Cluster, which has three supergiant ellipticals (M87 contains accretion disk indicating BH or WH in center--a quadrillion solar masses!) The Pisces-Cetus Complex: may include 400 rich (and lots of poor) clusters. Brent Tully. Is the Universe ...
Inv 3
... A physics student sitting in a stationary Lamborghini (car), is holding onto the steering wheel, and is strapped in with her seat belt. She knows that in the vertical direction, the gravitational force pulls her downward and the seat pushes her upward and that the net vertical force is zero, thus re ...
... A physics student sitting in a stationary Lamborghini (car), is holding onto the steering wheel, and is strapped in with her seat belt. She knows that in the vertical direction, the gravitational force pulls her downward and the seat pushes her upward and that the net vertical force is zero, thus re ...
Reminder: Acceleration
... m a is not a force! Don’t confuse mass and weight! Newton’s 2nd Law is only valid in Inertial Frames of Reference – In an accelerating car, there is no force pushing you into the seat instead, the seat is exerting an accelerating force on you – In a falling elevator, there is a force (weight) acting ...
... m a is not a force! Don’t confuse mass and weight! Newton’s 2nd Law is only valid in Inertial Frames of Reference – In an accelerating car, there is no force pushing you into the seat instead, the seat is exerting an accelerating force on you – In a falling elevator, there is a force (weight) acting ...
Lecture04
... up with an acceleration of 2 m/s2. The mass of the elevator is 100 kg. Ignore air resistance. What is the tension in the cable? 1. Identify Forces: Tension in cable, weight of the ...
... up with an acceleration of 2 m/s2. The mass of the elevator is 100 kg. Ignore air resistance. What is the tension in the cable? 1. Identify Forces: Tension in cable, weight of the ...
Newton`s First Law of Motion
... force (to deviate the Moon from a straight inertial trajectory) and that such a force decreased with distance – Orbital motion could be understood as a projectile moving “parallel” to the Earth’s surface at such a speed that its gravitational deflection toward the surface is offset by the surface’s ...
... force (to deviate the Moon from a straight inertial trajectory) and that such a force decreased with distance – Orbital motion could be understood as a projectile moving “parallel” to the Earth’s surface at such a speed that its gravitational deflection toward the surface is offset by the surface’s ...
Chapter 2 Mechanical Equilibrium
... 5. Which quantity will change based upon location: mass or weight? 6. What is the SI unit of mass? Weight? 7. Weight a. What equation is used to calculate the weight of an object? b. In what direction does the weight vector ALWAYS point? c. An object on Mars has a mass of 200 kg. If the weight of th ...
... 5. Which quantity will change based upon location: mass or weight? 6. What is the SI unit of mass? Weight? 7. Weight a. What equation is used to calculate the weight of an object? b. In what direction does the weight vector ALWAYS point? c. An object on Mars has a mass of 200 kg. If the weight of th ...
Newton
... that causes it to stop? The push of the stopped car. The car is at rest. What is the force that causes it to move? The push of the truck. ...
... that causes it to stop? The push of the stopped car. The car is at rest. What is the force that causes it to move? The push of the truck. ...
Chapter 4: Forces & Newton's Laws Example Questions & Problems F
... a. Forces are shown on two objects. For each figure, draw and label the net (i) net force vector and (ii) acceleration. ...
... a. Forces are shown on two objects. For each figure, draw and label the net (i) net force vector and (ii) acceleration. ...
Newton and Friction
... Newton and Friction Quick Fact Study Sheet Newton’s Laws 1) An object in motion will remain in motion unless an unbalanced force acts on it. If an object is moving at constant velocity, there is no acceleration or net force. Mass and inertia are proportional, the higher the mass the higher the inert ...
... Newton and Friction Quick Fact Study Sheet Newton’s Laws 1) An object in motion will remain in motion unless an unbalanced force acts on it. If an object is moving at constant velocity, there is no acceleration or net force. Mass and inertia are proportional, the higher the mass the higher the inert ...
Physical Science: Test Force
... A. Elastic B. Kinetic C. Sliding D. Inelastic E. Static 2. What is the unbalanced force that slows down a ball rolling across the floor? A. the force of gravity C. the force of inertia B. the force of momentum D. the force of friction 3. Which of the four main types of forces is the weakest? A. Elec ...
... A. Elastic B. Kinetic C. Sliding D. Inelastic E. Static 2. What is the unbalanced force that slows down a ball rolling across the floor? A. the force of gravity C. the force of inertia B. the force of momentum D. the force of friction 3. Which of the four main types of forces is the weakest? A. Elec ...
NEWTONS LAW`S OF MOTION
... proportional to the force causing it, is in the same direction as the force, and is inversely proportional to the mass of the object. or The rate of change of momentum of a body is proportional to the resultant force acting on the body and is in the same direction. ...
... proportional to the force causing it, is in the same direction as the force, and is inversely proportional to the mass of the object. or The rate of change of momentum of a body is proportional to the resultant force acting on the body and is in the same direction. ...
Gravity and Orbits
... Planets orbiting the Sun are subject to centripetal force, the same force that keeps a weight tethered to a string from `flying away when you rotate it. The centripetal force is the force that keeps objects on a curved path. In the case of planets, the centripetal force is due to gravity, and compen ...
... Planets orbiting the Sun are subject to centripetal force, the same force that keeps a weight tethered to a string from `flying away when you rotate it. The centripetal force is the force that keeps objects on a curved path. In the case of planets, the centripetal force is due to gravity, and compen ...
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.