A typical hard disk in a desktop computer is a uniformly solid, 400 gram disk 3.5 inches in diameter, and takes 70 milliseconds to spin from rest up to a frequency of 7200 revolutions per minute (r.p.m.). Problem 2.6. What is the moment of inertia of the disk in kgm2?Problem 2.7. Considering that work corresponds to a change in kinetic energy, how much work is done to accelerate the disk from rest to its final spinning rate?

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Q: A ring (mass 2 M, radius 2 R) rotates in a CCW direction with an initial angular speed 1 ω. A disk…

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Q: 1. I have two disks. Disk A has a mass per unit area σ given by σ = 5r2 and disk B has σ = 3r3 Each…

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A: Given: mass of each putty, M=2.25 kg side length of hexagon, L=1.20 m

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Q: A 150 g ball and a 250 g ball are connected by a 37-cm-long, massless, rigid rod. The balls rotate…

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Q: 4. A race is set up with four different round objects rolling down a ramp (2 meters high). The four…

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Q: A metal bar, weighing 2 kg with a length of 2 meters, freely spins around one of its extremities.…

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Q: A turntable with a moment of inertia of 0.028 kg∗m^2 rotates freely at 3.3 rad/s. A circular disk of…

A: Given data The initial moment of inertia of the turntable is Ii_t = 0.028 kgm2 The initial angular…

Q: Jennifer decided to install a ceiling fan in the master bedroom. After a laborious installation, she…

A: initial angular speed (w) = 0 final angular speed = 120 rev/min  = 2 rev/sec  = 12.57 rad/s t = 20…

Q: A particle of mass 1.30 kg is moving with velocity = (7.41 +5.6j) m/s. Find the angular momentum L…

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Q: Joey, whose mass is 36 kg, stands at the center of a 200 kg merrygo- round that is rotating once…

A: Given mass of Joey m=36 kgmass of merry go round m1=200 kgWhen Joey is all the centerIt is…

Q: A DVD is spinning at 650.133 rpm. What is the size of the angular momentum of the DVD if it has a…

A: Angular velocity , ω = 650.133 rpm = 68.1 rad/s Circumference , C = 38.97 cm = 0.39 m Mass , M =…

Q: A ring (mass 2 M, radius 2 R) rotates in a CCW direction with an initial angular speed 1 ω. A disk…

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Q: Q1. A bullet of mass m = 2.0 gram is moving horizontally with a speed v= 500.0 m/s. The bullet…

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Q: A 3.0-m-diameter merry-go-round with a mass of 250 kg is spinning at 20 rpm. Steven runs tangent to…

A: Given data: Diameter of merry-go-round is, d=3.0 m. Mass of merry-go-round is, M=250 kg. Initial…

Q: 1. A baby's toy is made up of six beads, each of mass M on a ring of radius R. Assume the ring has…

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Q: YURI!!! on air. For his final stunt, Yuri is go a jump with turns and has his arms exten moment of…

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Q: d) Calculate the time it takes for each disk to roll. e) What is the total kinetic energy for each…

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Q: A string is wound around a uniform disk of radius R and mass M. The disk is released from rest with…

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Q: An 800g ball with radius 2cm is travelling inthe + x direction at 5m/s. It strikes a stationaryball,…

A: The explanation was included in the answer portion.

Q: A uniform stick 1.4 m long with a total mass of 260 g is pivoted at its center. A 4.0-g bullet is…

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Q: A bicycle is traveling north at 7.03 m/s. The mass of the wheel, 1.96 kg, is uniformly distributed…

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Q: A space station consists of a large, lightweight ring of radius R = 60 m and two small heavy control…

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Q: I have two disks. Disk A has a mass per unit area σ given by σ = 5r2 and disk B has σ = 3r3 Each…

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Q: A 200 g puck revolves in a circle on a frictionless table at the end of a 50.0 cm long string. The…

A: Consider the mass of the puck be m, the angular momentum of the puck be L, the radius of the circle…

Q: An 800g ball with radius 2cm is travelling inthe +x direction at 5m/s. It strikes a stationaryball,…

A: The objective of the question is to find the velocity of the heavier ball after the collision and…

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Q: The polar moment of inertia for the area is Je-622 (10) mm, about the ' axis passing through the…

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Q: A spacecraft is launched into a low Earth orbit. The spacecraft principal moments of inertia are Ix…

A: Given:Ix = 98 kg·m²Iy = 102 kg·m²Iz = 150 kg·m² = 0.1 rad/s = 0.02 rad/st = time period (for this…

Q: mable to get to the other me his difficulty, he throw

A: Given: Mass of man is 750 N Mass of textbook is 1.6 kg Radius of frozen pond is 10 m speed is 7 m/s

Q: A 3.7-mm-diameter merry-go-round is rotating freely with an angular velocity of 0.90 rad/s. Its…

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Q: A hollow sphere (I=2/3mr^2) of radius R rotates about a diameter with an angular speed ω. The sphere…

A: The moment of inertia of a hollow sphere is =23MR2The angular momentum will be conserved. Angular…

Q: In (Figure 1), take m₁ = 3.4 kg and mg = 5 kg. Figure 5m 4 m 1.5 m 0 4 m m ▾ Part A Determine the…

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Q: a. 2. An oxygen gas molecule (O,) has a moment of inertia of 1.9 x 1046 kg · m? about an axis that…

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Q: Two bugs, Buzz and Crunchy, are siting on a spinning disk on a horizontal plane. Buzz is sitting…

A: Radius of disk, r=0.80 mAngular speed, ω=38 rpm=38×2π60=3.98 rad/s

Q: A disk of radius R = 10cm and mass m = 3kg spins horizontally at a rate of 10 revolutions per minute…

A: Given: The mass of the disk is 3 kg. The radius of the disk is 10 cm = 0.1 m. The initial angular…

Q: An object ( M=6 kg, R=0.9 m) has moment of inertia about its c.m equal 2.5 kg m2 rolls down an…

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Q: A skater has a moment of inertia of 3 kg.m2 (kilogram, meter squared) when her arms are outstretched…

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Q: h A solid disk with mass m and radius R is placed at the top of the ramp and released. The moment of…

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Q: 3. A mass hangs from a fixed pulley. The mass is released from rest. Find the speed of the mass when…

A: We know that: m1=8.0 kg r=0.25 m m2=2.6 kg h=0.85 m Applying conservation of energy:…

Q: What is the change in angular momentum of (a) the cockroach-disk system, (b) the cockroach, and (c)…

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Q: Three children are riding on the edge of a merry‑go‑round that has a mass of 105 kg105 kg and a…

A: Given, mass of merry-go-round M = 105kg, mass of children m1=22kg, m2=28kg, m3=33kg, initial angular…

Q: A solid sphere starts from rest and rolls down a slope that is 6.4 m long. If its speed at the…

A: Let h be the height of the slope. Then decrease in potential energy = increase in kinetic energy. or…