force and motion I problem 1 The figure below is an overhead view of a 12 kg tire that is to be pulled by three ropes. One force (Fl‚ with magnitude 50 N) is indicated. Orient the other two forces F2 and F3 so that the magnitude of the resulting acceleration of the tire is least‚ and find that magnitude if (a) F2 = 30N‚ F3= 20 N; (b) F2= 30 N‚ F3 = 10 N; and (c) F2 = F3 = 30 N. problem 2 A weight-conscious penguin with a mass of 15.0 kg rests on a bathroom scale (see figure below). What are (a)
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Duncan‚ Vinny‚ and Wayne are all friends working - or wasting time - the summer before senior year in high school. Duncan is the soul‚ Vinny the brains‚ and Wayne the muscle. At the end of the previous summer‚ Duncan tried to save a drowning girl and failed. Not being a hero has really affected his life‚ particularly his relationship with his girlfriend Kim. Also‚ he is now terrified of swimming‚ especially when the nightmares come back. Duncan’s summer job is with the public transit lost and
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Chapter 6. Uniform Acceleration Problems: Speed and Velocity 6-1. A car travels a distance of 86 km at an average speed of 8 m/s. How many hours were required for the trip? [pic] [pic] t = 2.99 h 6-2. Sound travels at an average speed of 340 m/s. Lightning from a distant thundercloud is seen almost immediately. If the sound of thunder reaches the ear 3 s later‚ how far away is the storm? [pic] t = 58.8 ms 6-3. A small rocket leaves its pad and travels a
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Uniform linear acceleration Introduction This topic is about particles which move in a straight line and accelerate uniformly. Problems can vary enormously‚ so you have to have your wits about you. Problems can be broken down into three main categories: Constant uniform acceleration Time-speed graphs Problems involving two particles Constant uniform acceleration Remember what the following variables represent: t = the time ; a = the acceleration ; u = the initial speed ; v = the final
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What is the direction of the acceleration vector for each of these situations? Remember that if an object speeds up‚ then the velocity and acceleration vectors are in the same direction. If an object slows down‚ then they are in opposite directions. Any object that is traveling in a vertical direction also experiences acceleration due to gravity. Left: Object travels to left and speeds up. Down: Object is tossed upward. A ball is tossed up into the air with a velocity of 50 m/s. The figure
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The Speed of Toy Cars & Measuring Acceleration Introduction: The Speed of Toy Cars & Measuring Acceleration was investigated by using a ticker timer and changing the angle of the ramp. Changing the angle of the ramp affects the speed and acceleration of the trolley. The speed and acceleration of the trolley was determined by using the ticker timer. Aim: The aim of the practical is to investigate the motion and acceleration of a trolley by using a ticker timer and rolling the trolley down a ramp
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Law of Acceleration (1907) by Henry Adams (1838-1918) Images are not arguments‚ rarely even lead to proof‚ but the mind craves them‚ and‚ of late more than ever‚ the keenest experimenters find twenty images better than one‚ especially if contradictory; since the human mind has already learned to deal in contradictions. The image needed here is that of a new center‚ or preponderating mass‚ artificially introduced on earth in the midst of a system of attractive forces that previously
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slightly lower speed than the Earth does‚ the radius of its orbit will slowly decrease‚ and it will move inward toward the Sun. This could bring the probe near the inner planets‚ Venus and Mercury. Acceleration of an Object in Uniform Circular Motion In this activity‚ you will explore the acceleration of an object that travels a circular path at constant speed. Motion of this kind is called uniform circular motion. A. The Gizmotm shows both a top view and a side view of a puck constrained by
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find out where the killer works and lives so they can prove to the police the diary is for real." http://www.oppapers.com/essays/Accelerat… You have to join them to read the full essays. eng1honors.wikispaces.com/file/view/Su… Preview of Acceleration – Graham McNamee "In this suspense story‚ the main character Duncan is haunted by the fact that he was unable to save a drowning girl one fateful afternoon the previous September. This summer‚ he has a job working underground at the Toronto subway
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Acceleration Due to Gravity Have you ever wondered why items always speed up when they are falling? Well it all has to do with acceleration due to gravity. Acceleration is the rate at which an object changes its velocity. Acceleration can be calculated by finding the change in velocity and dividing it over the time. The equation is: a= ∆v∆t (“Acceleration”) Acceleration is also a vector because it has a direction. The units of acceleration are typically m/s2. Gravity is the force that attracts
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