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Concept explainers
A black aluminum glider floats on a film of air above a level aluminum air track. Aluminum feels essentially no force in a magnetic field, and air resistance is negligible. A strong magnet is attached to the top of the glider, forming a total mass of 240 g. A piece of scrap iron attached to one end stop on the track attracts the magnet with a force of 0.823 N when the iron and the magnet are separated by 2.50 cm. (a) Find the acceleration of the glider at this instant. (b) The scrap iron is now attached to another green glider, forming total mass 120 g. Find the acceleration of each glider when the gliders are simultaneously released at 2.50-cm separation.
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Chapter 5 Solutions
Bundle: Physics For Scientists And Engineers With Modern Physics, 10th + Webassign Printed Access Card For Serway/jewett's Physics For Scientists And Engineers, 10th, Multi-term
- A 25kg wooden plate is held in place by two strings attached to the ceiling and the wall. The string attached to the ceiling makes an angle 40o with the horizontal and the string attached to the wall makes 90o with the wall. Determine the force in each string.arrow_forwardA m1 = 1.90-kg aluminum block and a m2 = 6.85-kg copper block are connected by a light string over a frictionless pulley. The two blocks are allowed to move on a fixed steel block wedge (of angle θ = 35.0°) For aluminum on steel, μs = 0.61 and μk = 0.47. For copper on steel, μs = 0.53 and μk = 0.36.) The steel block wedge is designed such that the left half of its surface is horizontal while its right half slopes downward, forming an inclined plane of angle θ (measured from the horizontal). A pulley is anchored where the horizontal surface and incline meet. A cord passing over the pulley connects an aluminum block of mass m1 on the horizontal surface to a copper block of mass m2 on the incline. (a) the acceleration of the two blocksm/s2(b) the tension in the stringNarrow_forwardA dynamometer is an instrument used to measure forces. A block of wood whose mass is 10 kilograms is on a table also made of wood and is pulled using a dynamometer. The force is exerted at an angle of 18 degrees. Determine the magnitude of the force that can be read about the dynamometer at the following times: a. Just before the block begins its movement (the coefficient of frictionstatic equals 0.35) b. When moving with a uniform speed (the dynamic coefficient of frictionequals 0.28) Free Body Diagram of ExerciseBalance of forces in both axesOperationsResultsarrow_forward
- A 0.470 kg wooden block is spun around on a wooden table. The wooden block is being spun around on a 2.00 m long massless wire. The wooden block has air being pushed out behind it causing a thrust force of 3.20 N. The air is being pushed out at 70.0° from the radial line as shown in the figure. If the block is initially at rest and the coefficient of friction is 0.360, what is the tension in the wire after 17.0 revolutions?arrow_forwardA dynamometer is an instrument used to measure forces. A block of wood whose mass is 10 kilograms is on a table also made of wood and is pulled using a dynamometer. Determine the magnitude of the force that can be read about the dynamometer at the following times: a. Just before the block begins its movement (the coefficient of frictionstatic equals 0.35) b. When moving with a uniform speed (the dynamic coefficient of frictionequals 0.28) Free Body Diagram of ExerciseBalance of forces in both axesOperationsResultsarrow_forwardA 5.00 kg stone is rubbed across the horizontal ceiling of a cave passageway . If the coefficient of kinetic friction is 0.65 and the force applied to the stone is angled at u 70.0°, what must the magnitude of the force be for the stone to move at constant velocity?arrow_forward
- It is autumn. You look outside a window and see a maple leaf falling face down, in a straight vertical line. You estimate the speed of the leaf to be 25.77 cm/s. You then pick up the leaf and do measurements. It has a mass of 2.76 g and a cross sectional area of 76 square cm. You measure the density of air to be 1.298 kg m-³. What is the drag coefficient between the leaf and the air? (numerical value only) Number (Hint: For an object to fall with constant speed, it must be at 'terminal velocity'.)arrow_forwardA steel cable lying flat on the floor drags a 30 kg block across a horizontal, frictionless floor. A 200 N force applied to the cable causes the block to reach a speed of 6 m/s in a distance of 3 m. Determine the mass of the cable.arrow_forwardA 75.0-g arrow, fired at a speed of 110 m/s to the left, impacts a tree, which it penetrates to a depth of 12.5 cm before coming to a stop. Assuming the force of friction exerted by the tree is constant, what are the magnitude and direction of the friction force acting on the arrow?arrow_forward
- A person of mass m stands on a rope ladder that is hanging from a freely floating balloon of mass M. The balloon is initially at rest with respect to the ground. (The buoyant force on the personballoon system is countering the force of gravity.) a. In what direction will the balloon move if the person starts to climb the rope ladder at constant velocity v relative to the ladder? b. At what speed will the balloon move if the person starts to climb the rope ladder at constant velocity v relative to the ladder?arrow_forwardWhy does a pilot tend to black out when pulling out of a steep dive?arrow_forwardAn object hangs between two walls which are 1.8 m apart. If the rope sags 15° below horizontal and the object’s mass is 1.5 kg, what is the tension in the rope?arrow_forward
- Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
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