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Science

Physics

R E ourse Home

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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The uniform 22-kg plate is released from rest at the position shown. (Figure 1) Figure A x 0.5 m- 1 of 1 0.5 m > Part A Determine its initial angular acceleration. Express your answer in radians per second squared to three significant figures. Enter positive value if the angular acceleration is clockwise and negative value if the angular acceleration is counterclockwise. a = Submit Part B 195| ΑΣΦ. 41 Request Answer vec ? rad/s² Review Determine the x and y components of reaction at the pin A using scalar notation. Express your answers in newtons to three significant figures separated by a comma.
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A merry-go-round accelerates from rest to 0.70 rad/s in 30 s. Part A Assuming the merry-go-round is a uniform disk of radius 8.0 m and mass 3.20×104 kg , calculate the net torque required to accelerate it. Express your answer to two significant figures and include the appropriate units.
A centrifuge rotor rotating at 9500 rpm is shut off and is eventually brought uniformly to rest by a frictional torque of 1.19 m. N. Part A If the mass of the rotor is 3.67 kg and it can be approximated as a solid cylinder of radius 0.0900 m, through how many revolutions will the rotor turn before coming to rest? Express your answer to three significant figures. Z II N Submit Part B 垢 ΑΣΦ Request Answer How long will it take? Express your answer to three significant figures and include the appropriate units. ?
A solid uniform 3.25-kg cylinder, 65.0 cm in diameter and 12.4 cm long, is connected to a 1.50-kg weight over two massless frictionless pulleys as shown in the figure below (Figure 1). The cylinder is free to rotate about an axle through its center perpendicular to its circular faces, and the system is released from rest. Figure 3.25 kg 1 of 1 1.50 kg Part A How far must the 1.50-kg weight fall before it reaches a speed of 2.40 m/s? Express your answer in meters. 17| ΑΣΦ d = Submit Part B Request Answer How fast is the cylinder turning at this instant? Express your answer in radians per second. VE ΑΣΦ) ? ? m
EXERCISE HINTS: GETTING STARTED I'M STUCK! A man ties one end of a strong rope 7.68 m long to the bumper of his truck, 0.534 m from the ground, and the other end to a vertical tree trunk at a height of 3.86 m. He uses the truck to create a tension of 7.73 x 10 N in the rope. Compute the magnitude of the torque on the tree due to the tension in the rope, with the base of the tree acting as the reference point. N. m
A kitchen door is attached to a vertical support by a set of hinges. Assume the door is uniform and has height 2.40 m, width 0.865 m, and mass 21.0 kg. A. Determine its moment of inertia (in kg · m2) for rotation on its hinges. B. Are any pieces of data unnecessary? (Select all that apply.) The height of the door is unnecessary. The width of the door is unnecessary. The mass of the door is unnecessary. No; all of the data are necessary.
F. (Homework #6 Problem 9.88 Part A A thin, light wire is wrapped around the rim of a wheel, as shown in the following figure(Figure 1). The wheel rotates about a stationary horizontal axle that passes through the center of the wheel. The wheel has radius 0.170 m and moment of inertia for rotation about the axle of 0.530 kg m2.A small block with mass 0.320 kg is suspended from the free end of the wire. When the system is released from rest, the block descends with constant acceleration. The bearings in the wheel at the axle are rusty, so friction there does -5.00 J of work as the block descends 2.75 m What is the magnitude of the angular velocity of the wheel after the block has descended 2.75 m ? Express your answer with the appropriate units. a) ? 3.67 Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining < Return to Assignment Provide Feedback Figure 1 of 1 MacBook Air F2 F3 O00 F4 F5 F6 DD F7 F8 $ & V 3. 4. 5. 9. 7. 8. 6 P. K. 7.
The shaded area shown in (Figure 1) is bounded by y axis and the curve y² = (2.56-z) m², where z is in m. Suppose that a=2.56 m, h=1.6 m. Figure h 1 of 1 x Part A Determine the moment of inertia for the shaded area about the z axis. Express your answer to three significant figures and include the appropriate units. > View Available Hint(s) 12= Submit Value < Return to Assignment 4 → Units Provide Feedback ?
A pulley on a frictionless axle has the shape of a uniform solid disk of mass 2.60 kg and radius 20.0 cm. A 1.90 kg stone is attached to a very light wire that is wrapped around the rim of the pulley (Figure 1), and the system is released from rest. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of An unwinding cable ii. Part A How far must the stone fall so that the pulley has 5.00 J of kinetic energy? Express your answer with the appropriate units. HÅ h = .58 m 0 ?
A solid cylindrical pulley with a mass of 1.60 kg and a radius of 0.290 m is free to rotate about its axis. An object of mass 0.270 kg is attached to the pulley with a light string (the figure below). Assume the string does not stretch or slip. "Calculate the tension in the string. (Express your answer to three significant figures.) Submit N Calculate the angular acceleration of the pulley. (Express your answer to three significant figures.) rad/s² Submit f