notes - SchoolRack
... Balanced forces: when 2 or more forces act on the same object equally in opposite directions. Unbalanced forces: unequal forces that act on an object and change its motion. ...
... Balanced forces: when 2 or more forces act on the same object equally in opposite directions. Unbalanced forces: unequal forces that act on an object and change its motion. ...
Newtons Laws ppt
... Only if there is friction! In the absence of any net external force, an object will keep moving at a constant speed in a straight line, or remain at rest. This is also known as the law of inertia. ...
... Only if there is friction! In the absence of any net external force, an object will keep moving at a constant speed in a straight line, or remain at rest. This is also known as the law of inertia. ...
Forces Test I
... 3. After a cannon ball is fired into frictionless space, the amount of force needed to keep it going equals ___. a) twice the force with which it was fired. d) one quarter of the force with which it was fired. b) one half the force with which it was fired. e) the same amount of force with which it w ...
... 3. After a cannon ball is fired into frictionless space, the amount of force needed to keep it going equals ___. a) twice the force with which it was fired. d) one quarter of the force with which it was fired. b) one half the force with which it was fired. e) the same amount of force with which it w ...
Mid Year Review
... a) Determine how long it takes Joe to catch Sheila. 13.3 s b) Determine how far Joe travels by the time he catches Sheila. 93.3 m c) At what time will Joe be 10 m ahead of Sheila? 16.7 s d) When Joe has run 200 m, how far has Sheila run? 154.3 m e) Write equations for Joe’s motion and Sheila’s motio ...
... a) Determine how long it takes Joe to catch Sheila. 13.3 s b) Determine how far Joe travels by the time he catches Sheila. 93.3 m c) At what time will Joe be 10 m ahead of Sheila? 16.7 s d) When Joe has run 200 m, how far has Sheila run? 154.3 m e) Write equations for Joe’s motion and Sheila’s motio ...
Forces and Motion
... Our bodies are adapted to the amount of pressure present at sea level. If we go up into the air or below water our bodies have to acclimatize. However, the range that our bodies can acclimatize to is pretty small. ...
... Our bodies are adapted to the amount of pressure present at sea level. If we go up into the air or below water our bodies have to acclimatize. However, the range that our bodies can acclimatize to is pretty small. ...
HW7
... 9.75. We orient our +x axis along the initial direction of motion, and specify angles in the “standard” way — so = +60° for the proton (1), which is assumed to scatter into the first quadrant and = –30° for the target proton (2), which scatters into the fourth quadrant (recall that the problem h ...
... 9.75. We orient our +x axis along the initial direction of motion, and specify angles in the “standard” way — so = +60° for the proton (1), which is assumed to scatter into the first quadrant and = –30° for the target proton (2), which scatters into the fourth quadrant (recall that the problem h ...
Topic 3 – Motions and forces
... The arrows show the direction in which the forces act The length of the arrows shows the size of the forces (the longer the arrow, the bigger the size of the force) RESULTANT FORCES Resultant force: When more than one force acts on an object, the effect is the same as if they were combined into a si ...
... The arrows show the direction in which the forces act The length of the arrows shows the size of the forces (the longer the arrow, the bigger the size of the force) RESULTANT FORCES Resultant force: When more than one force acts on an object, the effect is the same as if they were combined into a si ...
gravity - Nikhef
... ..neutrino’s can only see up to here.. ..but gravitational waves can see up to here! ...
... ..neutrino’s can only see up to here.. ..but gravitational waves can see up to here! ...
13. Hookes Law and SHM
... always opposite to the direction of the restoring force, even though as one quantity gets bigger so does the other. *Simple Harmonic Motion (S.H.M.) Basically what’s going on is that an object has its natural resting point, and if, when it gets disturbed from this point it tries to return but actual ...
... always opposite to the direction of the restoring force, even though as one quantity gets bigger so does the other. *Simple Harmonic Motion (S.H.M.) Basically what’s going on is that an object has its natural resting point, and if, when it gets disturbed from this point it tries to return but actual ...
OCR Physics A Refer to the Physics A datasheet for data, formulae
... © Oxford University Press 2016 http://www.oxfordsecondary.co.uk/acknowledgements This resource sheet may have been changed from the original ...
... © Oxford University Press 2016 http://www.oxfordsecondary.co.uk/acknowledgements This resource sheet may have been changed from the original ...
Physics - Teachers
... study of matter, energy, force, and motion, and the way they relate to each other The study of matter, motion, energy and forces. ...
... study of matter, energy, force, and motion, and the way they relate to each other The study of matter, motion, energy and forces. ...
Class heading
... 21. You push harder and harder on a box until it begins sliding across the floor. Which was the stronger of the forces acting on the box, static friction or sliding friction? 22. How do ball bearings reduce friction in machinery? 23. Explain why a falling object subjected to Earth's gravity does not ...
... 21. You push harder and harder on a box until it begins sliding across the floor. Which was the stronger of the forces acting on the box, static friction or sliding friction? 22. How do ball bearings reduce friction in machinery? 23. Explain why a falling object subjected to Earth's gravity does not ...
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.