• Part A A thin, light wire is wrapped around the rim of a wheel, as shown in the following figure(Eigure.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 inerlia 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. HẢ 11 ? Value Units Submit Request Answer

• Part A A thin, light wire is wrapped around the rim of a wheel, as shown in the following figure(Eigure.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 inerlia 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. HẢ 11 ? Value Units Submit Request Answer

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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IP A popular ride at amusement parks is illustrated in the figure ( Eigure 1). In this ride, people sit in a swing that is suspended from a rotating arm. Riders are at a distance of 12 m from the axis of rotation and move with a speed of 35 mi/h. Figure 12 m 1 of 1 T Part A Find the centripetal acceleration of the riders. Express your answer using two significant figures. G| ΑΣΦ 5 Submit Part B Request Answer Find the angle the supporting wires make with the vertical. Express your answer using two significant figures. 195] ΑΣΦΑ Submit Request Answer ?
A hoop, a disk, and a solid sphere with equal masses and equal radii, all roll without slipping down an inclined plane starting from rest. Which of the following is NOT true? (Inoop = mr? ; Idisk = mp ; Isolid sphere = mr2) O The force of gravity along the plane will be equal for all. O At the bottom, the rotational kinetic energy will be greatest for the sphere. O At the bottom, the angular velocity about the center of the object will be greatest for the sphere. O At the bottom, the rotational plus translational kinetic energy will be the same for each object. O At the bottom, the translational kinetic energy will be least for the hoop.
A bicycle racer is going downhill at 14.0 m/s when to his horror, one of his 2.07 kg wheels comes off when he is 73.0 m above the foot of the hill We can model the wheel as a thin-walled cylinder 850 cm in diameter and neglect the small mass of the spokes Part A How fast is the wheel moving when it reaches the foot of the hill if it roled without slipping all the way down? Submit Part B VAL Request Answer A + How much total kinetic energy does the wheel have when it reaches the bottom of the hill? K-1101290.25 Submit Previous Answers Request Answer ? X Incorrect; Try Again m/s 3
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Please explain the concepts of how to work the following practice problem out: A playground carousel is rotating counterclockwise about its center on frictionless bearings. A person standing still on the ground grabs onto one of the bars on the carousel very close to its outer edge and climbs aboard. Thus, this person begins with an angular speed of zero and ends up with a nonzero angular speed, which means that he underwent a counterclockwise angular acceleration. The carousel has a radius of 1.61 m, an initial angular speed of 3.03 rad/s, and a moment of inertia of 127 kg*m2. The mass of the person is 40.3 kg. Find the final angular speed of the carousel after the person climbs aboard.
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A person of mass 76 kgkg stands at the center of a rotating merry-go-round platform of radius 3.5 mm and moment of inertia 900 kg⋅m2kg⋅m2 . The platform rotates without friction with angular velocity 0.90 rad/srad/s . The person walks radially to the edge of the platform. Part A Calculate the angular velocity when the person reaches the edge. Express your answer using three significant figures and include the appropriate units.
A lawn mower has a flat, rod-shaped steel blade that rotates about its center. The mass of the blade is 0.65 kg and its length is 0.55 m. You may want to review (Pages 314 - 318). Part A What is the rotational energy of the blade at its operating angular speed of 3460 rpm ? Express your answer using two significant figures. Kr= Submit Part B v Templates Symbols undo redo reset keyboard shortcuts help y = Request Answer If all of the rotational kinetic energy of the blade could be converted to gravitational potential energy, to what height would the blade rise? Express your answer using two significant figures. J Templates Symbols undo redo reset keyboard shortcuts help m
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A bicycle racer is going downhill at 12.9 m/s when, to his horror, one of his 2.27 kg wheels comes off when he is 80.0 m above the foot of the hill. We can model the wheel as a thin-walled cylinder 85.0 cm in diameter and neglect the small mass of the spokes. Part A How fast is the wheel moving when it reaches the foot of the hill if it rolled without slipping all the way down? Η ΑΣΦ V₁ = 28.0 ? m/s Submit Previous Answers Request Answer × Incorrect; Try Again Part B How much total kinetic energy does the wheel have when it reaches the bottom of the hill? ΜΕ ΑΣΦ Ke 1780 Submit Previous Answers Request Answer × Incorrect; Try Again ? J