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... 4. Two forces, given by F1 = (- 6i - 4j) N and F2 = (- 3i + 7j) N, act on a particle of mass 2 kg that is initially at rest at the origin. (a) What are the components of the particle’s velocity at t = 10 s. (b) In what direction is the particle moving at t = 10 s , (c) What displacement does the par ...
... 4. Two forces, given by F1 = (- 6i - 4j) N and F2 = (- 3i + 7j) N, act on a particle of mass 2 kg that is initially at rest at the origin. (a) What are the components of the particle’s velocity at t = 10 s. (b) In what direction is the particle moving at t = 10 s , (c) What displacement does the par ...
Answers to Sample exam 2004
... When you arrive at Duke’s Dude Ranch, you are greeted by the large wooden sign shown in the figure below. The left end of the sign is held in place by a bolt, the right end is tied to a rope that makes an angle of 20.0° with the horizontal. If the sign is uniform, 3.20 m long, and has a mass of 16.0 ...
... When you arrive at Duke’s Dude Ranch, you are greeted by the large wooden sign shown in the figure below. The left end of the sign is held in place by a bolt, the right end is tied to a rope that makes an angle of 20.0° with the horizontal. If the sign is uniform, 3.20 m long, and has a mass of 16.0 ...
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... some friends decide to make a communications device invented by the Australian Aborigines. It consists of a noise-maker swung in a vertical circle on the end of a string. Your design calls for a 400 gram noise-maker on a 60 cm string. You are worried about whether the string you have will be strong ...
... some friends decide to make a communications device invented by the Australian Aborigines. It consists of a noise-maker swung in a vertical circle on the end of a string. Your design calls for a 400 gram noise-maker on a 60 cm string. You are worried about whether the string you have will be strong ...
absolute brightness: The apparent brightness a star would have if it
... electromagnetic radiation: Consists of massless packets of pure energy called photons produced by changes in the energy of charged particles, usually electrons. Photons travel through space at the speed of light. When the changes of energy are small, streams of photons can be described as waves of c ...
... electromagnetic radiation: Consists of massless packets of pure energy called photons produced by changes in the energy of charged particles, usually electrons. Photons travel through space at the speed of light. When the changes of energy are small, streams of photons can be described as waves of c ...
+ B
... Newton’s Second Law Newton’s second law of motion will be discussed quantitatively in a later chapter, after we have covered acceleration. Acceleration is the rate at which the speed of an object changes. An object with an acceleration of 2 m/s2, for example, is an object whose speed increases by 2 ...
... Newton’s Second Law Newton’s second law of motion will be discussed quantitatively in a later chapter, after we have covered acceleration. Acceleration is the rate at which the speed of an object changes. An object with an acceleration of 2 m/s2, for example, is an object whose speed increases by 2 ...
Force - FHS gators love Science
... •How would the force have to change in order to have the same acceleration for the eight carts as for one cart? •The force would have to be 8x greater •How would another force directed to the left on the cart affect the cart’s acceleration? •The acceleration would depend on the net force. •The net f ...
... •How would the force have to change in order to have the same acceleration for the eight carts as for one cart? •The force would have to be 8x greater •How would another force directed to the left on the cart affect the cart’s acceleration? •The acceleration would depend on the net force. •The net f ...
FE REV Q
... Calculate the average acceleration from the time when the brakes are applied to the time when the car stops. Calculate the distance travelled by the car after the time when the driver perceives the emergency. Consider a drunken driver whose reaction time is twice as long as that of the sober driver ...
... Calculate the average acceleration from the time when the brakes are applied to the time when the car stops. Calculate the distance travelled by the car after the time when the driver perceives the emergency. Consider a drunken driver whose reaction time is twice as long as that of the sober driver ...
Ch. 9 Rotational Kinematics
... How would you write this kinetic energy expression in terms of angular speed? ...
... How would you write this kinetic energy expression in terms of angular speed? ...
Velocity and Acceleration presentation
... which direction? What about when it hits the floor? If you throw it upwards, does it accelerate then? Which direction? ...
... which direction? What about when it hits the floor? If you throw it upwards, does it accelerate then? Which direction? ...
MASS vs. WEIGHT Weight is a measurement of the force on an
... Weight is a measurement of the force on an object caused by gravity trying to pull the object down. Mars has less gravity than Earth. Therefore if you were on Mars you'd weigh less because the force of gravity wouldn't be as strong as it is here on Earth. Does this mean you would suddenly be thinner ...
... Weight is a measurement of the force on an object caused by gravity trying to pull the object down. Mars has less gravity than Earth. Therefore if you were on Mars you'd weigh less because the force of gravity wouldn't be as strong as it is here on Earth. Does this mean you would suddenly be thinner ...
Midterm Review - MrStapleton.com
... a. Bob wants to lift Pam a vertical distance of 0.5m. How much work must Bob do to accomplish this? b. If Bob grabs the end of the board, he has to lift the board 1m in order to lift Pam 0.5m. How much force will Bob need to apply? c. How much torque is Pam generating? d. The torque created by Pam s ...
... a. Bob wants to lift Pam a vertical distance of 0.5m. How much work must Bob do to accomplish this? b. If Bob grabs the end of the board, he has to lift the board 1m in order to lift Pam 0.5m. How much force will Bob need to apply? c. How much torque is Pam generating? d. The torque created by Pam s ...
Chapter 4 Forces and Newton`s Law
... motion of objects. As you read and consider the Laws of Motion presented in this chapter, make a point to relate the meaning of the laws to real experiences you have had with bicycles, automobiles, electric trains, etc. SUGGESTED STUDY PROCEDURE - As you begin your study of this module, begin by car ...
... motion of objects. As you read and consider the Laws of Motion presented in this chapter, make a point to relate the meaning of the laws to real experiences you have had with bicycles, automobiles, electric trains, etc. SUGGESTED STUDY PROCEDURE - As you begin your study of this module, begin by car ...
Solutions to Homework Set #3 Phys2414 – Fall 2005
... Note: The numbers in the boxes correspond to those that are generated by WebAssign. The numbers on your individual assignment will vary. Any calculated quantities that involve these variable numbers will be boxed as well. 1. GRR1 3.P.001. Two cars, a Porsche and a Honda, are traveling in the same di ...
... Note: The numbers in the boxes correspond to those that are generated by WebAssign. The numbers on your individual assignment will vary. Any calculated quantities that involve these variable numbers will be boxed as well. 1. GRR1 3.P.001. Two cars, a Porsche and a Honda, are traveling in the same di ...
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.