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Figure 4.5 shows a force
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- The starship Enterprise has its tractor beam locked onto some valuable debris and is trying to pull it toward the ship. A Klingon battle cruiser and a Romulan warbird are also trying to recover the item by pulling the debris with their tractor beams as shown in Figure P5.25. a. Given the following magnitudes of the tractor beam forces, find the net force experienced by the debris: FEnt = 7.59 106 N, FRom = 2.53 106 N, and FKling = 8.97 105 N. b. If the debris has a mass of 2549 kg, what is the net acceleration of the debris? FIGURE P5.25arrow_forwardWhy is the following situation impossible? A book sits on an inclined plane on the surface of the Earth. The angle of the plane with the horizontal is 60.0. The coefficient of kinetic friction between the book and the plane of 0.300. At time t = 0, the book is released from rest. The book then slides through a distance of 1.00 m, measured along the plane, in a time interval of 0.483 s.arrow_forwardQuestion 8: A horizontal external force F is applied to block of mass 3m so that it moves horizontally as shown in Figure 4. The coefficient of friction force between the block of mass 4m and the ground is 3u while the coefficient of friction force between the blocks is u (g is the gravitational acceleration.). Find the acceleration of block of mass 3m relative to the ground. -> µ 3M 4M 3µ Figure 4 Select one: F - 9µMg 3M F - 3µMg 3M 2F – 18µMg 3M F- 18μMg 6M 2F – 21µMg 6Marrow_forward
- An elevator carrying a person of mass m is moving upward and slowing down. How does the magnitude F of the force exerted on the person by the elevator floor compare with the magnitude mg of the gravitational force? a F < mg b F > mg c F = mg d F can be greater than or less than mg, depending on the speed of the elevator.arrow_forwardIn the figure, a rectangular slab of slate rests on a bedrock surface inclined at angle = 25.6°. The slab has length L = 43.4 m, thickness T = 6.23 m, and width W = 13.6 m, and 1.0 cm³ of it has a mass of 3.2 g. The coefficient of static friction between slab and bedrock is 0.351. (a) Calculate the component of the gravitational force on the slab parallel to the bedrock surface. (b) Calculate the magnitude of the static frictional force on the slab. By comparing (a) and (b), you can see that the slab is in danger of sliding. This is prevented only by chance protrusions of bedrock. (c) To stabilize the slab, bolts are to be driven perpendicular to the bedrock surface (two bolts are shown). If each bolt has a cross-sectional area of 6.42 cm² and will snap under a shearing stress of 3.57 × 108 N/m², what is the minimum number of bolts needed? Assume that the bolts do not affect the normal force.arrow_forwardA force in the +x-direction with magnitude F(x) = 18.0 N - (0.530 N/m)x is applied to a 8.30 kg box that is sitting on the horizontal, frictionless surface of a frozen lake. F(x) is the only horizontal force on the box.arrow_forward
- Tarzan, who weighs 820 N, swings from a cliff at the end of a 20.0 m vine that hangs from a high tree limb and initially makes an angle of 22.0 with the vertical. Assume that an x axis extends horizontally away from the cliff edge and a y axis extends upward. Immediately after Tarzan steps off the cliff, the tension in the vine is 760 N. Just then, what are (a) the force on him from the vine in unit-vector notation and the net force on him (b) in unit-vector notation and as (c) a magnitude and (d) an angle relative to the positive direction of the x axis? What are the (e) magnitude and (f) angle of Tarzan’s acceleration just then?arrow_forwardA 10.0 kg mass is acted on by the two forces: and F1=(3.0N)i+(2.0N)j and F2=(10.0N)i+(7N.0)7 a) Express the summation of these two forces in unit vector notation. That is: b) What is the acceleration of this mass while these forces are acting? Write your answer in unit vector notation. c) What is the direction of the acceleration (give the angle of acceleration with the x axis)?arrow_forwardYou are trying to move a light fixture into an apartment. There are hooks in the elevator so you hang the fixture on a hook with a chain. You don't want the fixture to touch the walls, so you attach a rope to the side that pulls horizontally as shown, keeping the fixture stationary with respect to the elevator. Note theta =38∘. As the elevator ascends vertically, the magnitude of the tension force in the chain from the elevator on the fixture as a function of the vertical position of the elevator, y, is Fcf(y)=F_0*e^-y/y1 where F_0=167 N and y1=3.3 m. Using the fixture as your system, if the elevator goes from y=0 to y=5.94m, what is the work done by the tension force in the chain on the fixture?arrow_forward
- A student of weight 651 N rides a steadily rotating Ferris wheel (the student sits upright). At the highest point, the magnitude of the normal force ?→?F→N on the student from the seat is 586 N. (a) What is the magnitude of ?→?F→N at the lowest point? If the wheel's speed is doubled, what is the magnitude FN at the (b) highest and (c) lowest point?arrow_forwardA) An object weighing 500kg is to be pulled by a man by exerting a force P.Force P is inclined at an angle of 25 deg. measured from the positive axis. The object and the floor has a coefficient of friction: static = 0.35 and dynamic = 0.15. 1. What is the total distance travelled by the object after 5 seconds when the magnitude of P is equal to 8,000 N? Express your answer in unit of m 2. What should be the magnitude of P to cause an acceleration to the object equal to 0.5i m/s^2. Express your answer in unit of kN.arrow_forwardA cooler (mass 3 kg) is initially at rest on a horizontal floor. It is then pushed in a straight line for 1.5 m by a small child who exerts a horizontal force with magnitude 37.5 N.arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning