General Physics – ph 211
... 32. A passenger on the Ferris wheel normally weighs 403 N. The Ferris wheel has a 25 m radius and is equipped with a powerful motor. The operator revs it up so that the customers at the top of the wheel feel zero g's (they momentarily lift slightly off their seats). A) At what angular velocity will ...
... 32. A passenger on the Ferris wheel normally weighs 403 N. The Ferris wheel has a 25 m radius and is equipped with a powerful motor. The operator revs it up so that the customers at the top of the wheel feel zero g's (they momentarily lift slightly off their seats). A) At what angular velocity will ...
Solutions to Problems: Work and Energy
... 58. We usually neglect the mass of a spring if it is a small compared to the mass attached to the spring. But in some applications, the mass of the spring must be taken into account. Consider a spring of unstretched length L and mass MS. This mass is uniformly distributed along the length of the spr ...
... 58. We usually neglect the mass of a spring if it is a small compared to the mass attached to the spring. But in some applications, the mass of the spring must be taken into account. Consider a spring of unstretched length L and mass MS. This mass is uniformly distributed along the length of the spr ...
rotational motion & law of gravity
... Centripetal Force • Required to maintain centripetal acceleration (Newton’s Laws) • Directed toward the center • Acts at right angles to motion • Ex: gravity, friction, strings… Fc = mac = mr2 = mvt2/r ...
... Centripetal Force • Required to maintain centripetal acceleration (Newton’s Laws) • Directed toward the center • Acts at right angles to motion • Ex: gravity, friction, strings… Fc = mac = mr2 = mvt2/r ...
Death of Stars
... Discuss the synthesis Can you discuss fusion reactions up to iron of elements in stars ...
... Discuss the synthesis Can you discuss fusion reactions up to iron of elements in stars ...
Chapter 4-6 - OPFI Conceptual Physics
... If you stop and think for a moment, it may be surprising to recognize that mass plays two different roles here. On one hand, it determines the strength of the gravitational force acting on the ball. On the other hand, it determines the inertia of the ball (its resistance to being accelerated). Why s ...
... If you stop and think for a moment, it may be surprising to recognize that mass plays two different roles here. On one hand, it determines the strength of the gravitational force acting on the ball. On the other hand, it determines the inertia of the ball (its resistance to being accelerated). Why s ...
Chapter 12 Notes
... Bob pushed his motorcycle with a force of 297.2 Newtons and it accelerated at a rate of 3.1 m/s/s. If the friction force was 12.2 N, what is the motorcycle’s mass? (hint: find the net force first, then use m=F/a) ...
... Bob pushed his motorcycle with a force of 297.2 Newtons and it accelerated at a rate of 3.1 m/s/s. If the friction force was 12.2 N, what is the motorcycle’s mass? (hint: find the net force first, then use m=F/a) ...
Newton`s first law of motion
... Newton’s first law of motion: the physical law stating that objects do not change their motion unless a force is applied to them; also known as Newton’s law of inertia Newton’s second law of motion: the physical law stating that the net force F on an object equals the product of the object’s mass m ...
... Newton’s first law of motion: the physical law stating that objects do not change their motion unless a force is applied to them; also known as Newton’s law of inertia Newton’s second law of motion: the physical law stating that the net force F on an object equals the product of the object’s mass m ...
d. all of the above.
... It is now 10:29 AM but when the bell rings at 10:30AM David will be late for Science Class for the third time this week. He must get from one side of the school to the other by hurrying down three different hallways. He runs down the first hallway, a distance of 35.0m, at a speed of 3.5m/s. The sec ...
... It is now 10:29 AM but when the bell rings at 10:30AM David will be late for Science Class for the third time this week. He must get from one side of the school to the other by hurrying down three different hallways. He runs down the first hallway, a distance of 35.0m, at a speed of 3.5m/s. The sec ...
Dynamics Rewrite Problems 1. A 0.40 kg toy car moves at constant
... 12. The coefficient of kinetic friction between an object and the surface upon which it is sliding is 0.25. The weight of the object is 20N. What is the force of friction? 13. The force of friction between an object and the surface upon which it is sliding is 15 N. The mass of the object is 20.0 kg. ...
... 12. The coefficient of kinetic friction between an object and the surface upon which it is sliding is 0.25. The weight of the object is 20N. What is the force of friction? 13. The force of friction between an object and the surface upon which it is sliding is 15 N. The mass of the object is 20.0 kg. ...
acceleration of an inertial reference frame
... Inertia is the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line. The mass of an object is a quantitative measure of inertia. ...
... Inertia is the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line. The mass of an object is a quantitative measure of inertia. ...
Air Resistance
... Centripetal Force Imagine whirling an object tied to a string above your head. The string exerts a centripetal force on the object that keeps it moving in a circular path. In the same way, Earth’s gravity exerts a centripetal force on the Moon that keeps it moving in a nearly circular orbit. ...
... Centripetal Force Imagine whirling an object tied to a string above your head. The string exerts a centripetal force on the object that keeps it moving in a circular path. In the same way, Earth’s gravity exerts a centripetal force on the Moon that keeps it moving in a nearly circular orbit. ...
The Milky Way
... Why do stars behind dust clouds appear red? Why is the sky blue? Why are wavelengths of light outside the visible useful in studying the Milky Way? • How is the 21 cm line of Hydrogen produced? • Describe the spiral arms of the Milky Way and what ...
... Why do stars behind dust clouds appear red? Why is the sky blue? Why are wavelengths of light outside the visible useful in studying the Milky Way? • How is the 21 cm line of Hydrogen produced? • Describe the spiral arms of the Milky Way and what ...
Quantifying Gravity at the Earth`s Surface
... force on a particular mass, while the acceleration due to gravity is the motion caused by that force. The fact that these two phenomena have the same value is the result of how the Newton was defined (the force required to accelerate 1 Kg at 1 m/s/s). The distinction between the strength of a gravit ...
... force on a particular mass, while the acceleration due to gravity is the motion caused by that force. The fact that these two phenomena have the same value is the result of how the Newton was defined (the force required to accelerate 1 Kg at 1 m/s/s). The distinction between the strength of a gravit ...
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Document
... Nope, not fig newtons…Sir Isaac Newton A little bit stuffy, bad hair, but quite an intelligent guy. He was a genius mathematician & physician in the 1700’s. During his work, he came up with the three basic ideas that are applied to the physics of most motion. The ideas have been tested and ...
... Nope, not fig newtons…Sir Isaac Newton A little bit stuffy, bad hair, but quite an intelligent guy. He was a genius mathematician & physician in the 1700’s. During his work, he came up with the three basic ideas that are applied to the physics of most motion. The ideas have been tested and ...
Lecture05-09
... A 71-kg parent and a 19-kg child meet at the center of an ice rink. They place their hands together and push. (a) Is the force experienced by the child more than, less than, or the same as the force experienced by the parent? (b) Is the acceleration of the child more than, less than, or the same as ...
... A 71-kg parent and a 19-kg child meet at the center of an ice rink. They place their hands together and push. (a) Is the force experienced by the child more than, less than, or the same as the force experienced by the parent? (b) Is the acceleration of the child more than, less than, or the same as ...
color-stellar mass diagram
... constituent stars (ignoring complications such as internal absorption by dust or co-evolving binary systems): ...
... constituent stars (ignoring complications such as internal absorption by dust or co-evolving binary systems): ...
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.