Dynamics Homework
... 22. * Referring to the last question, when astronauts walked on the Moon they wore heavy spacesuits. What does the effect of mass and weight on the Moon mean about their physical activity on the Moon? 23. * (a) Can a normal force on an object be directed horizontally? If not, why not? If so, give an ...
... 22. * Referring to the last question, when astronauts walked on the Moon they wore heavy spacesuits. What does the effect of mass and weight on the Moon mean about their physical activity on the Moon? 23. * (a) Can a normal force on an object be directed horizontally? If not, why not? If so, give an ...
Dynamics Homework
... 22. * Referring to the last question, when astronauts walked on the Moon they wore heavy spacesuits. What does the effect of mass and weight on the Moon mean about their physical activity on the Moon? 23. * (a) Can a normal force on an object be directed horizontally? If not, why not? If so, give an ...
... 22. * Referring to the last question, when astronauts walked on the Moon they wore heavy spacesuits. What does the effect of mass and weight on the Moon mean about their physical activity on the Moon? 23. * (a) Can a normal force on an object be directed horizontally? If not, why not? If so, give an ...
PES 1110 Fall 2013, Spendier Lecture 11/Page 1 Today
... because how much mass do these steps have? A lot! The second law is about what’s being pushed. If I push down on the steps this attempts to make the steps accelerate downwards. It says nothing about you or me walking up the steps. But it is all about me. So far what happens to me is unexplained. Wha ...
... because how much mass do these steps have? A lot! The second law is about what’s being pushed. If I push down on the steps this attempts to make the steps accelerate downwards. It says nothing about you or me walking up the steps. But it is all about me. So far what happens to me is unexplained. Wha ...
Rotational Motion: Moment of Inertia
... faster than when your arms were extended. This illustrates that not only mass but also how it is distributed (i.e. moment of inertia) affects rotational motion. ...
... faster than when your arms were extended. This illustrates that not only mass but also how it is distributed (i.e. moment of inertia) affects rotational motion. ...
document
... Static Friction: Push with a force F and block does not move because fs = F. The force of friction varies from 0 up to some maximum. The maximum value equals fs = msN, where N is the normal force. Above we would have fs = msmg. The coefficient of static friction ranges from 0 to 1.2 Kinetic Friction ...
... Static Friction: Push with a force F and block does not move because fs = F. The force of friction varies from 0 up to some maximum. The maximum value equals fs = msN, where N is the normal force. Above we would have fs = msmg. The coefficient of static friction ranges from 0 to 1.2 Kinetic Friction ...
Slides - PDF - University of Toronto Physics
... Note on Posted Slides • These are the slides that I intended to show in class on Thu. Jan. 16, 2014. • They contain important ideas and questions from your reading. • Due to time constraints, I was probably not able to show all the slides during class. • They are all posted here for completeness. ...
... Note on Posted Slides • These are the slides that I intended to show in class on Thu. Jan. 16, 2014. • They contain important ideas and questions from your reading. • Due to time constraints, I was probably not able to show all the slides during class. • They are all posted here for completeness. ...
Slides - Powerpoint - University of Toronto Physics
... • Due to time constraints, I was probably not able to show all the slides during class. • They are all posted here for completeness. ...
... • Due to time constraints, I was probably not able to show all the slides during class. • They are all posted here for completeness. ...
free body diagrams: resultant force
... Mr. Moors pulls 2 sleds connected with ropes with a force of 250 N. The first sled has a mass of 50 kg while the second sled has a mass of 36 kg. Assume the snow is frictionless. a) Draw fbd's for the two sleds. b) What was the acceleration of the two sleds? (2.907 m/s 2) c) What was the tension in ...
... Mr. Moors pulls 2 sleds connected with ropes with a force of 250 N. The first sled has a mass of 50 kg while the second sled has a mass of 36 kg. Assume the snow is frictionless. a) Draw fbd's for the two sleds. b) What was the acceleration of the two sleds? (2.907 m/s 2) c) What was the tension in ...
Lecture 1
... The time H0−1 is referred to as the “Hubble time”. For H0 = 70 s−1 Mpc−1 , the Hubble time is H0−1 = 14 Gyr. ⇒ The Big Bang scenario. If the universe was expanding more rapidly in the past than it is now, the universe is younger than H0−1 (matter). If the universe was expanding more slowly in the pa ...
... The time H0−1 is referred to as the “Hubble time”. For H0 = 70 s−1 Mpc−1 , the Hubble time is H0−1 = 14 Gyr. ⇒ The Big Bang scenario. If the universe was expanding more rapidly in the past than it is now, the universe is younger than H0−1 (matter). If the universe was expanding more slowly in the pa ...
Solutions #9
... For each torque, use Eq. 10-10c. Take counterclockwise torques to be positive. (a) Each force has a lever arm of 1.0 m. about 1.0 m 56 N sin 30 1.0 m 52 N sin 60 17m N ...
... For each torque, use Eq. 10-10c. Take counterclockwise torques to be positive. (a) Each force has a lever arm of 1.0 m. about 1.0 m 56 N sin 30 1.0 m 52 N sin 60 17m N ...
Packet 5 - Cir Motion Torque
... 1974M2. The moment of inertia of a uniform solid sphere (mass M, radius R) about a diameter is 2MR²/5. The sphere is placed on an inclined plane (angle ) as shown above and released from rest. a. Determine the minimum coefficient of friction between the sphere and plane with which the sphere will ...
... 1974M2. The moment of inertia of a uniform solid sphere (mass M, radius R) about a diameter is 2MR²/5. The sphere is placed on an inclined plane (angle ) as shown above and released from rest. a. Determine the minimum coefficient of friction between the sphere and plane with which the sphere 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.