Static and Kinetic Friction Introduction The amount of friction force between two surfaces in contact depends on the type of the surfaces in contact and the amount of compression between the surfaces. Static friction is the force that is acting against your force before the object begins to move. If you exert a small push on the box‚ the box will not move because static friction is directly opposite to the push. If you apply a greater force than the static friction force‚ the friction increases
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1. A football field is 120 yd long and 50 yd wide. What is the area of the football field‚ in m2‚ if 1 yd = 91.44 cm? (Points : 5) [pic]5.0 x 103 m2 [pic]2.4 x 103 m2 [pic]4.2 x 103 m2 [pic]3.7 x 103 m2 | | |2. Suppose that an object travels from one point in space to another. Make a comparison between the displacement and the distance| |traveled. (Points : 5) |
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Effects of Movie Piracy on Box-office Revenue Arthur S. De Vany · W. David Walls Published online: 24 August 2007 © Springer Science+Business Media‚ LLC 2007 Abstract Piracy is one of the most challenging problems faced by the motion picture industry. The Motion Picture Association of America estimates that US studios lose more than $3 billion annually in box office revenue from piracy. They have launched a major effort to prevent these losses. Yet their efforts are hampered by the ex post‚ counterfactual
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The 6000kg cart starts from rest (Point A); the cart begins to be moved by electromagnetics that emit 2‚200‚000 Watts. By the 10 metre mark‚ the cart has already reached its maximum speed of 44.72 m/s‚ due to it being accelerated by 36.66m/s (Figure 2.1). The cart is then propelled at a constant speed for a total of 200 metres (Point B); the cart is then left on its own as it enters the curve of the track. The curve has a radius of 100 metres‚ which becomes slowly tighter
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Latihan 5: Magnetism Magnetic Fields 1. An electron gun fires electrons into a magnetic field directed straight downward. Find the direction of the force exerted by the field on an electron for each of the following directions of the electron’s velocity: (a) horizontal and due north; (b) horizontal and 30° west of north; (c) due north‚ but at 30° below the horizontal; (d) straight upward. 2. (a) Find the direction of the force on a proton moving through the magnetic fields in Figure
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Physics of Car Crashes INTERNAL - Notes INJURIES TO A HUMAN: During a car crash‚ there are three different collisions that occur. The first one is the collision of the car and the opposing object‚ the second is the human inside the car and the car itself. The final collision is the ones that occur within the human body itself. BRAIN: The human brain is protected by the cranial cavity or the skull. The brain is suspended in a substance called the cerebral spinal fluid‚ which is denser than the skull
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Between Magnetism and Electricity It is well known that whenever an electric current flows through a conductor‚ a magnetic field is immediately brought into existence in the space surrounding the conductor. It can be said that when electrons are in motion‚ they produce a magnetic field. The converse of this is also true i.e. when a magnetic field embracing a conductor moves relative to the conductor‚ it produces a flow of electrons in the conductor. This phenomenon whereby an e.m.f. and hence current
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propagation of light is best described by a wave model‚ but understanding emission and absorption requires a particle approach. The fundamental sources of all electromagnetic radiation are electric charges in accelerated motion. All bodies emit electromagnetic radiation as a result of thermal motion of their molecules; this radiation‚ called thermal radiation‚ is a mixture of different wavelengths. At sufficiently high temperatures‚ all matter emits enough visible light to be self-luminous; a very hot
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upholstery care guide upholstery care guide ACTIMA - RCS Nanterre B 400 009 981 all about leather YOU’VE JUST PURCHASED A ROCHE BOBOIS SOFA: You’ve been captivated by its sleek design and color; now you’re ready to discover the secrets beneath its elegant surface: how it was built‚ and how to preserve its fine quality. This manual will guide you through the care and maintenance of your ROCHE B OB OIS Sofa. THE ➀ ROCHE BOBOIS BEGINS AT THE TANNERY. BEAUTY‚ ALLURE‚ AND SUPPLENESS
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to meet the traditional physical objections to the Earth’s motion: since a body in motion tends to remain in motion‚ projectiles and other objects on the terrestrial surface will tend to share the motions of the Earth‚ which will thus be imperceptible to someone standing on the
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