Part A Auniform hollow disk has two pieces of thin light wire wrapped around its outer rim and is supported from the ceiling (See the figure below (Figure 1)). Suddenly one of the wires breaks, and the remaining wire does not slip as the disk rolls down. Use energy conservation to find the speed of the center of this disk after it has fallen a distance of 2.20 m. Va AEd ? Vem= m/s Submit Request Answer Provide Feedback Figure 1 of 1> 50.0 cm

Part A Auniform hollow disk has two pieces of thin light wire wrapped around its outer rim and is supported from the ceiling (See the figure below (Figure 1)). Suddenly one of the wires breaks, and the remaining wire does not slip as the disk rolls down. Use energy conservation to find the speed of the center of this disk after it has fallen a distance of 2.20 m. Va AEd ? Vem= m/s Submit Request Answer Provide Feedback Figure 1 of 1> 50.0 cm

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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d. The rod moves 3.0 m/s to the right because an external agent is exerting a constantforce on it to the right. What is the magnitude of this force? e. Use your answer to part (d) to find the rate at which the external agent does workon the rod.f. Discuss the significance of your results for parts (c) and (e)
In a hydroelectric dam, water falls 27 m and then spins a turbine to generate electricity. Part A What is AU of 1.0 kg of water? Express your answer with the appropriate units. ► View Available Hint(s) AU = Submit Part B m 1 1s = μA Submit Value Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of water must pass through the turbines each second to generate 55 MW of electricity? This is a typical value for a small hydroelectric dam. Express your answer in kilograms per second. ► View Available Hint(s) www [-] ΑΣΦ Units ? ? kg/s
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Question 3 One of the largest waterfalls in the world, the Iguazu Falls, are located on the border of Argentina and Brazil. a. Research online to determine the height of the Iguazu Falls. (Cite your answer!) A log of wood with mass 1350 kg moves at 7ms-lin the water and tumbles over the falls. b. Calculate the kinetic energy of the log before it falls over the edge. c. Calculate the GPE of the log before it falls over the edge. d. Hence, calculate the total energy before the log falls over the edge. e. Calculate the velocity of the log as it hits the bottom of the waterfall. f. Discuss any limitations or assumptions regarding your calculation in part e.
A 90 kg firefighter needs to climb the stairs of a 30-m-tall building while carrying a 40 kg backpack filled with gears. Part A How much power does he need to reach the top in 60 s? Express your answer with the appropriate units. P = Submit μA Value Request Answer → Units ?
Circular Motion A 1 Kg bead is confined to move on a vertical circle of radius 2 meters. There is no friction between the bead and the circular track. The bead has a speed of 10 m/s when at the top of the circle at point "A", and the total mechanical energy of the bead is assumed to be constant as it moves around the circle. Assume it takes the bead 0.62 seconds to go counter-clockwise from point "A" to point "B" each cycle. 10 m/s 2 m Previous A 30° Note: vector directions should be given as the "standard" angle with 0 ≤0 < 360 degrees Calculate the direction of the velocity of the bead at point "B". Enter the standard angle in degrees.
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Read the introduction to Tutorial 4 in the Tutorial Manual to help you answer the questions below. How do the base units of energy compare to the base units of work? Hint: use dimensional analysis using a fundamental principle such as the definition of work to determine units. same base units different base units Question 23 Imagine a system with a certain amount of kinetic energy. Which of the following systems would have a larger kinetic energy? Asystem with more mass but the same speed DA system with less mass but the same speed CLA system with the same mass but greater speed DA system with the same mass but smaller speed
Circular Motion A 1 Kg bead is confined to move on a vertical circle of radius 2 meters. There is no friction between the bead and the circular track. The bead has a speed of 10 m/s when at the top of the circle at point "A", and the total mechanical energy of the bead is assumed to be constant as it moves around the circle. Assume it takes the bead 0.62 seconds to go counter-clockwise from point "A" to point "B" each cycle. 10 m/s 2 m 30° Note: vector directions should be given as the "standard" angle with 0≤0 < 360 degrees Calculate the average speed (m/s) from "A" to "B" (based on the 0.62 seconds mentioned in the description).
List the factors you need to measure to calculate the initial mechanical energy of the skater when he was at the top of the ramp and why you need them
Figure Energy (J) 4- 3 2 1 0- -1 -2 + K₁ + U₁ + W ext = K₁ + Uf + AEth 1 of 1
A hand pushes a 3 kg block along a table from point A to point C as shown in the figure below. The table has been prepared so that the left half of the table (from A to B) is frictionless. The right half (from B to C) has a non-zero coefficient of friction equal to µ. The hand pushes the block the full distance from A to C using a constant force of 5 N. The block starts off at rest at point A and comes to a stop when it reaches point C. The distance from A to B is 0.5 m and the distance from B to C is also 0.5 m. We will consider the block by itself as our system so all forces on the block are external. Initial position of block Final position ofblock P no friction friction A B C -1½ m 1½ m