angular acceleration
Q: Review Multiple-Concept Example 7 in this chapter as an aid in solving this problem. In a fast-pitch…
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Q: A car is traveling along a road, and its engine is turning over with an angular velocity of +220…
A: The initial angular velocity of the car's engine is ωo=220 rad/s.The final angular velocity of the…
Q: A thin disk rotates about an axis that goes through its center perpendicular to its plane. The…
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Q: A discus thrower exerts a torque of 4.5 Nm on a 1.9 kg discus. The discus has a radius of gyration…
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Q: A soccer player extends her lower leg in a kicking motion by exerting a force with the muscle above…
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Q: A playground merry-go-round has a mass of 120 kg and a radius of 1.80 m and it is rotating with an…
A: It is given that,
Q: A 50-Nm torque acts on a wheel with a moment of inertia 150 kg m2. Part A) How many radians are…
A: Given:- The torque on a wheel is τ= 50 Nm. The moment of inertia of the wheel is I = 150 kgm2.…
Q: A playground merry-go-round has a mass of 120 kg and a radius of 1.80 m and it is rotating with an…
A: Given Data:- Mass of the merry-go-round is M=120 kg Radius of the merry-go-round is R=1.80 m Initial…
Q: A torque of magnitude 50Nm acts for 10 seconds to start a small merry-go-round (I = 1/2*m*r^2 ) of…
A: Given data: Torque (τ) = 50 Nm Time (t) = 10 seconds Moment of inertia (I) = (1/2)mr2 Radius (r) =…
Q: An object located on the edge of a merry-go-round a distance of 4.65 cm form the center. What's the…
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Q: An object that is initially at rest begins to rotate under a constant angular acceleration of 1.95…
A: Given that----- angular acceleration = 1.95 rad / sec2 angular displacement = 193 rad. Question ❓…
Q: A car starts from rest and accelerates uniformly with no slipping between the tires and road. If one…
A: The wheel has an angular acceleration…
Q: A wheel with a 15 cm radius rotating at 3 rad/s begins to speed up. After 5 seconds have passed, the…
A: In this problem the angular acceleration of the object is uniform so we can use equation of motion.
Q: A figure skater is spinning with an angular velocity of +13.3 rad/s. She then comes to a stop over a…
A: Given data: Initial angular velocity of the skatter is, ω0=+13.3 rad/s Final angular velocity of the…
Q: What constant angular acceleration is required to reduce an object's angular velocity from 35.9…
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Q: A disk with moment of inertia 7.3 kg m^2 spins at 19 rad/s about its center axis. If a brake exerts…
A: Given : Moment of inertia, I = 7.3 kg m2 Angular velocity, ω = 19 rad/s Force, F = 80 N…
Q: A merry-go-round that can freely rotate is initially at rest. The merry-go-round has a radius of 1.4…
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Q: The bowling ball has mass 6 kg, diameter 24 cm. The moment of inertia of a solid sphere around its…
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Q: A skater is spinning with an initial angular velocity of 6 rad/s with her arms stretched out. When…
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Q: A figure skater is spinning with an angular velocity of +16.5 rad/s. She then comes to a stop over a…
A: (a) Average angular acceleration is,
Q: What is the magnitude of the total acceleration of the tip of a 1.20-m (radius) airplane propeller…
A: Given, The radius of the propellor is, r=1.2m Angular velocity, ω=6rad/s Angular acceleration is,…
Q: An object that is initially at rest undergoes an angular acceleration of 1.62 rad/s2. What is the…
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Q: uppose you're an field engineer inspecting an offshore wind turbine. You're in a boat approaching a…
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Q: You are happily spinning in your desk chair when at 3.50 rad/s. You lift your legs up and notice…
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Q: Suppose a yo-yo has a center shaft that has a 0.290 cm radius and that its string is being pulled.…
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Q: In a stunt that his friends say is crazy, a physics student jumps off a high diving platform and…
A: Number of revolutions (n) = 1.5height of platform above the swimming pool (h) = 12 m
Q: A figure skater is spinning with an angular velocity of +10.3 rad/s. She then comes to a stop over a…
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Q: A wheel with a 15 cm radius rotating at 3 rad/s begins to speed up. After 5 seconds have passed, the…
A: Radius of the wheelInitial angular speed Time intervalNumber of complete rotation
Q: In figure skating, kelen rotated at an angular speed of 9.04 rad/s with her arms pulled in. At the…
A: The given values are, ωi=9.04 rad/sIi=3.05 kg·m2ωf=4.37 rad/s
Q: A uniform solid disk of radius 3 m and mass 2.0 kg rolls without slipping. to the bottom of an…
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A volleyball player spikes the ball. At the instant that she begins to extend her shoulder to bring her arm forwards, her shoulder is in 225 degrees of flexion. She contacts the ball 0.185 s later with her shoulder in 164 degrees of flexion (and extending). 0.118278688525 s later, at the end of her follow-through, her shoulder stops extending at a flexion angle of 125 .
What was the average
- before ball contact: deg/s2
- after ball contact: deg/s2
Use the convention that flexing is positive
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- playground merry-go-round of radius R=2.00m has a moment of inertia? = 250??. ?2 and is rotating at 10.0 ???/??? about a frictionless vertical axle. Facing the axle, a 25.0-kg child hops onto the merry-go-round from the ground and manages to sit down on its edge. What is the new angular speed of the merry-go-round?A disk, initially rotating at 101 rad/s, is slowed down with a constant angular acceleration of magnitude 3.90 rad/s?. (a) How much time does the disk take to stop? (b) Through what angle (rad) does the disk rotate during that time? (a) Number Units (b) Number i UnitsA dentist causes the bit of a high speed drill to accelerate from an angular speed of 1.76e4 rad/s to an angular speed of 3.71e4 rad/s. In the process, the bit turns through 1.62e4 rad.Assuming a constant angular acceleration, how long would it take the bit to reach its maximum speed of 8.42e4 rad/s starting from rest.
- A diver performs a flip in the air. The radius of gyration is 0.43 when the diver initially leave the board and the diver is rotating at an angular velocity of 6.3 rad/sec. What is the linear velocity of the head when they decrease their radius of gyration to 0.24. The distance from the head to the center of gravity of the individual is 0.3 meters?A figure skater is spinning with an angular velocity of +16.4 rad/s. She then comes to a stop over a brief period of time. During this time, her angular displacement is +3.65 rad. Determine (a) her average angular acceleration and (b) the time during which she comes to rest.Ice skaters can increase the angular speed of their spins by pulling their arms towards their body. A skater with their arms extended has a moment of inertia of 2.49 kg m2 and a moment of inertia of 0.77 kg m2 after pulling their arms in. If a skater begins a spin with their arms extended such that they are rotating with an angular speed of 2.07 rad/s, what will their rotation speed be when they pull their arms in?
- A disc with 0.6 kg m^2 moment of inertia is free to rotate about its center. Two forces F1=5N and F2=3N is applied perpendicularly but on the opposite sides of disc. What is its angular acceleration if radius is 0.2 meters.A playground merry-go-round of radius R = 1.20 m has a moment of inertia I = 255 kg · m2 and is rotating at 9.0 rev/min about a frictionless vertical axle. Facing the axle, a 23.0-kg child hops onto the merry-go-round and manages to sit down on the edge. What is the new angular speed of the merry-go-round? rev/min Need Help? Read It Watch ItA net torque with a magnitude of 10.0 N.m acts on an object that starts at rest. Find the magnitude of the final angular speed after 7.0 seconds if the object is a thin spherical shell of 2.5 kg and radius 330 cm.
- Jeff, running outside to play, pushes on a swinging door, causing its motion to be briefly described by ? = 8.5t2 + 0.650t + 1.75, where t is in seconds and ? is in radians. At t = 0 and at t = 1.50 s, what are the following? (a) angular position of the door ?(0) = rad ?(1.50) = rad (b) angular speed of the door ?(0) = rad/s ?(1.50) = rad/s (c) angular acceleration of the door ?(0) = rad/s2 ?(1.50) = rad/s2A playground merry-go-round has a mass of 133kg and a radius of 1.82m and it is rotating with an angular velocity of 0.424rev/s. What is its angular velocity after a 29-kg child gets onto it by grabbing its outer edge? The child is initially at rest.