Final Exam
... 10. A block m1=2.0 kg is placed on a frictionless 30o incline and connected to another block m2 = 6 kg by a light string as shown in the figures. The pulley has a moment of inertia 0.40 kg m2 and radius 0.2 m It rotates as the block m2 falls down. Find the acceleration of m1. ( in m/s2) T1 − m1 g si ...
... 10. A block m1=2.0 kg is placed on a frictionless 30o incline and connected to another block m2 = 6 kg by a light string as shown in the figures. The pulley has a moment of inertia 0.40 kg m2 and radius 0.2 m It rotates as the block m2 falls down. Find the acceleration of m1. ( in m/s2) T1 − m1 g si ...
Newton`s Laws of Motion
... pressing down on the chair and the chair is pushing back with an equal and opposite force. • You step out of a boat onto a dock. You move forward but the boat moves in the opposite direction away from the dock. ...
... pressing down on the chair and the chair is pushing back with an equal and opposite force. • You step out of a boat onto a dock. You move forward but the boat moves in the opposite direction away from the dock. ...
Chp. 7 Outline: Circular Motion and Gravity Lecture Questions: 1
... 1) A cave dweller rotates a pebble in a sling with a radius of .30 m counterclockwise through an arc length of 0.96 m. What is the angular displacement of the pebble? 2) What is the approximate angular speed of a wheel rotating at the rate of 5.0 rev/s? 3) A grinding wheel initially at rest with a r ...
... 1) A cave dweller rotates a pebble in a sling with a radius of .30 m counterclockwise through an arc length of 0.96 m. What is the angular displacement of the pebble? 2) What is the approximate angular speed of a wheel rotating at the rate of 5.0 rev/s? 3) A grinding wheel initially at rest with a r ...
Newton`s Second Law
... laws of motion are the best known of these. The first law seems to be at odds with our everyday experience. Newton’s first law states that any object at rest that is not acted upon by outside forces will remain at rest, and that any object in motion not acted upon by outside forces will continue its ...
... laws of motion are the best known of these. The first law seems to be at odds with our everyday experience. Newton’s first law states that any object at rest that is not acted upon by outside forces will remain at rest, and that any object in motion not acted upon by outside forces will continue its ...
Orbits in Spherical Potentials
... • Once we have solved for the gravitational potential (Poisson’s eq.) of a system we want to know: How do stars move in gravitational potentials? • Neglect stellar encounters • use smoothed potential due to system or galaxy as a whole ...
... • Once we have solved for the gravitational potential (Poisson’s eq.) of a system we want to know: How do stars move in gravitational potentials? • Neglect stellar encounters • use smoothed potential due to system or galaxy as a whole ...
Chapter 8
... horizontally, the objects are 1.0 m from the axis of rotation, and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is 3.0 kg • m2 and is assumed to be constant. The student then pulls the objects horizontally to 0.30 m from the rotation axis. (a) Find ...
... horizontally, the objects are 1.0 m from the axis of rotation, and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is 3.0 kg • m2 and is assumed to be constant. The student then pulls the objects horizontally to 0.30 m from the rotation axis. (a) Find ...
Exam #1 Aristotle Onward Quantifying motion Question: acceleration
... B. Its speed increases proportional to time. C. Its speed increases proportional to time squared. D. Its speed increases proportional to the square root of time. ...
... B. Its speed increases proportional to time. C. Its speed increases proportional to time squared. D. Its speed increases proportional to the square root of time. ...
AP C UNIT 4 - student handout
... K 2 mi ri i ( is constant so it can be pulled out) i 1 ...
... K 2 mi ri i ( is constant so it can be pulled out) i 1 ...
GRADE 11F: Physics 1
... • if the two interacting objects are of very different mass, the effect on the larger mass can be difficult to detect; • in many situations there is more than one pair of forces. As an example, discuss the forces acting when an object (e.g. a stone) falls freely. Students might argue that there is o ...
... • if the two interacting objects are of very different mass, the effect on the larger mass can be difficult to detect; • in many situations there is more than one pair of forces. As an example, discuss the forces acting when an object (e.g. a stone) falls freely. Students might argue that there is o ...
Goal: To understand how Galileo and Newton
... • Law 3: the Law of Action and Reaction Whenever one body exerts a force on a 2nd body, the 2nd body exerts an equal and opposite force on the first body. ...
... • Law 3: the Law of Action and Reaction Whenever one body exerts a force on a 2nd body, the 2nd body exerts an equal and opposite force on the first body. ...
Lecture 7
... The arrangement of walls and voids on the largest scales is reminiscent of a bubble-like or “frothy” structure. The pattern of superclusters, walls, and voids is called large-scale structure (LSS). On still larger scales, the Universe seems to be uniform. The “end of greatness” has been reached. 4) ...
... The arrangement of walls and voids on the largest scales is reminiscent of a bubble-like or “frothy” structure. The pattern of superclusters, walls, and voids is called large-scale structure (LSS). On still larger scales, the Universe seems to be uniform. The “end of greatness” has been reached. 4) ...
Solution key to exam 1 - University of Rochester
... Put “T” next to statements you believe to be true, “F” next to statements you believe to be false, and “N” next to statements that are sometimes true and sometimes false. ____ Sir Issac Newton formulated a useful theory of gravitation. ____ Charles Coulomb discovered the fundamental nature of light ...
... Put “T” next to statements you believe to be true, “F” next to statements you believe to be false, and “N” next to statements that are sometimes true and sometimes false. ____ Sir Issac Newton formulated a useful theory of gravitation. ____ Charles Coulomb discovered the fundamental nature of light ...
Presentation - ScienceScene
... Tension - Tension force is the force exerted by a string, spring, beam or other object which is being stretched compressed. The electric forces among the molecules give rise to the force. ...
... Tension - Tension force is the force exerted by a string, spring, beam or other object which is being stretched compressed. The electric forces among the molecules give rise to the force. ...
hw3,4
... on the moon as it is to accelerate the same car on Earth. This is because A) the mass of the car is independent of gravity. B) the weight of the car is independent of gravity. C) ...Nonsense! A car is much more easily accelerated on the moon than on the Earth. 10) In which case would you have the la ...
... on the moon as it is to accelerate the same car on Earth. This is because A) the mass of the car is independent of gravity. B) the weight of the car is independent of gravity. C) ...Nonsense! A car is much more easily accelerated on the moon than on the Earth. 10) In which case would you have the la ...
Ch. 4
... Mass is the quantity of matter. Mass measures “inertia”. Mass is measured in kilograms (kg) Weight is the force on mass due to gravity. Weight is measured in newtons (N) or pounds (lb). • Weight ~ Mass • 1 kg of mass has a weight of 2.2 lbs ...
... Mass is the quantity of matter. Mass measures “inertia”. Mass is measured in kilograms (kg) Weight is the force on mass due to gravity. Weight is measured in newtons (N) or pounds (lb). • Weight ~ Mass • 1 kg of mass has a weight of 2.2 lbs ...
Driven harmonic motion
... From the graph above you should notice that the FORCE involved is not constant, but varies with position; therefore, the accleration is not constant either. You cannot use the constant acceleration equations (big 3). You must use conservation of energy to determine velocity at various positions. o E ...
... From the graph above you should notice that the FORCE involved is not constant, but varies with position; therefore, the accleration is not constant either. You cannot use the constant acceleration equations (big 3). You must use conservation of energy to determine velocity at various positions. o E ...
Centripetal acceleration
... a linear velocity of 50 m/s. What should the distance from the central axis to the crew’s cabin’s be so that the crew feels like they are on earth? (the floor of the cabins is the inside of the outer edge of the spaceship) ...
... a linear velocity of 50 m/s. What should the distance from the central axis to the crew’s cabin’s be so that the crew feels like they are on earth? (the floor of the cabins is the inside of the outer edge of the spaceship) ...
PHYSICS 231 INTRODUCTORY PHYSICS I Lecture 5
... A fisherman catches a 20 lb trout (mass=9.072 kg), and takes the trout in an elevator to the 78th floor to impress his girl friend, who is the CEO of a large accounting firm. The fish is hanging on a scale, which reads 20 lb.s while the fisherman is stationary. Later, he returns via the elevator to ...
... A fisherman catches a 20 lb trout (mass=9.072 kg), and takes the trout in an elevator to the 78th floor to impress his girl friend, who is the CEO of a large accounting firm. The fish is hanging on a scale, which reads 20 lb.s while the fisherman is stationary. Later, he returns via the elevator to ...
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.