4. When a fan is turned off, its angular speed decreases from 168 rpm to 64.0 rpm in 6.08 s. a) What is the angular acceleration of the fan? b) How fast the edges of the blades are moving (in m/s) at time 6.08 s, if they are 86.0 cm long?

4. When a fan is turned off, its angular speed decreases from 168 rpm to 64.0 rpm in 6.08 s. a) What is the angular acceleration of the fan? b) How fast the edges of the blades are moving (in m/s) at time 6.08 s, if they are 86.0 cm long?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter10: Rotational Motion And Angular Momentum

Section: Chapter Questions

Problem 5PE: With the aid of a string, a gyroscope is accelerated from rest to 32 rad/s in 0.40 s. (a) What is...

See similar textbooks

Related questions

Q: 1. The tyre is freely rotating at the rate of 50 rad/s and moving forwards (exactly like rotation of…

A: Here given the tyre is rotating at a rate 50 rad/s . The radius of the tyre is 60 cm. There are A,O…

Q: A phonograph record accelerates from rest to 36.0 rpm in 3.83 s. (a) What is its angular…

A: Given data: Initial angular velocity (ω0) = 0 rad/s Final angular velocity (ω) = 36.0 rpm Time (t) =…

Q: 3. An object makes 10 revolutions in 2 minutes. What is the angular velocity of the object? a) 0.1…

A: Write the given values of the problem- Revolutions(N)=10 Time(t)=2 min t= 120 s

Q: 3. A merry-go-round rotates from rest with an angular acceleration of 1.50 rad/s?. How long does it…

Q: **8. A truck accelerates uniformly from rest and after 5 seconds the 50-cm radius wheels on the…

A: Given:

Q: A fan blade, initially at rest, rotates with a constant acceleration of 0.025 rad/s2. What is the…

Q: A truck with 0.420-m-radius tires travels at 32.0 m/s. What is the angular velocity of the rotating…

Q: A computer disk drive is turned on starting from rest and has constant angular acceleration. 1) If…

A: Given, Constant angular acceleration

Q: 1. An object is swung in a horizontal circle with a radius of 0.5 m. If the object makes one full…

Q: 6. Jaycie stands on the outer rim of a merry-go-round, and Helen stands midway between the center…

Q: Pilots can be tested for the stresses of flying high-speed jets in a whirling “human centrifuge,”…

Q: A centrifuge in a medical laboratory rotates at an angular speed of 3,450 rev/min. When switched…

A: Given data: Initial angular velocity (ω0) = 3450 rev/min Angular displacement (Δθ) = 52.0…

Q: A bicycle tire is spinning clockwise at 3.40 rad/s. During a time period Δt = 1.20 s, the tire is…

A: Negative means anti-clockwise positive means clockwise direction

Q: A CD has a diameter of 120mm and spins at 540 rpm. A- what is period? B- If a speck of dust is…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: Human centrifuges are used to train military pilots and astronauts in preparation for high-g…

A: (a) The centripetal acceleration in terms of angular speed is given by, ac=rω2 Here, r is the radius…

Q: Suppose a teenager puts her bicycle on its back and starts the rear wheel spinning from rest to a…

A: The required expression for the angular acceleration is,

Q: 8. A man is travelling at 25 m/s on the edge of a centrifuge device used for testing astronauts and…

A: Given Speed v= 25 m/s Radius r = length of arm = 20m

Q: 3. A merry-go-round rotates from rest with an angular acceleration of 1.56 rad/s. How long does it…

Q: I Review | Constants An airplane propeller is rotating at 1840 rev/min. Part A Compute the…

Q: An ultracentrifuge accelerates at a constant rate from rest to 108500rpm in 2 minutes. All questions…

A: Using formula for the constant angular acceleration :that is ;ω=ω∘+αtω→final angular…

Q: A phonograph record accelerates from rest to 40.0 rpm in 5.33 s. (a) What is its angular…

Q: Suppose a truck is going Around around about somewhere in Wisconsin. The roundabout has a radius of…

Q: A gyroscope slows from an initial rate of 58.8 rad/s at a rate of 0.801 rad/s². (a) How long does it…

A: Given that: ω=58.8 rad/sα=0.801 rad/s2t=? Since, t=ωαt=58.80.801t=73.408 s

Q: A merry-go-round rotates from rest with an angular acceleration of 1.50 rad/s2. How long does it…

Q: 1. A rotating disk speeds up from 3 rad/s to 5 rad/s in 0.2 s. What is the disk's average angular…

A: Hi. as you have posted multiple questions and have not specified which question needs to be solved,…

Q: 8. If an object is rotating at an acceleration of 6.2 rad/s?, solve the following: a. What is the…

Q: 22. The angular speed of the rotor in a centrifuge increases from 420 to 1420 rad/s in a time of…

A: a) The rate change of the angular displacement, θ=ωavgttherefore,ωavg=ω+ω02θ=ω+ω02t

Q: 1 A high speed drill reaches 2000 rpm in 0.5 s. What is the drill's angular acceleration? How many…

Q: 1. The blades of a fan running at low speed turn at 300 rpm. When the fan is switched to high speed,…

A: initial angular speed = 300 rpm = 300 x 2π60rad/s…

Q: A centrifuge in a forensic investigation laboratory rotates at an angular speed of 3,650 rev/min,…

A: Given that the final speed of the centrifuge is zero. Calculate the initial angular speed. ω0 =…

Q: (II) A child rolls a ball on a level floor 3.5 m to another child. If the ball makes 12.0…

A: The Length covered by the ball is equal to the product of the number of revolutions of the ball and…

Q: A rotating wheel requires 3.08-s to rotate through 37.0 revolutions. Its angular speed at the end of…

A: According to the rotational kinematics equation, find the initial angular velocity,…

Q: Pilots can be tested for the stresses of flying high-speed jets in a whirling “human centrifuge,”…

A: Angular velocity is defined as the rate of change of angular displacement with time. Angular…

Q: 2. A wheel of radius 14.0 cm starts from rest and tums through 2.0 revolutions in 3.0s. a. What is…

A: Given Radius r = 14 cm = 0.14 m Angular displacement = number of revolution × 2 π = 4 π time t = 3…

Q: 2.What is the angular velocity of an object traveling in a circle of radius 0.75m with a linear…

Q: A flywheel slows from 508.5 rev/min down to 352.2 rev/min while spinning through 32.3 revolutions.…

Q: A strap, rod, or something comparable is used to spin up the disc. I imagine someone hand-starting a…

Q: A wheel has its speed increased from 120 to 240 r/min in 20 s. What is the angular acceleration? How…

A: Given: The initial angular speed is 120 rev/min. The final angular speed is 240 rev/min. The time…

Q: A bicycle wheel is rotating at 50 rpm when the cyclist begins to pedal harder, giving the wheel a…

Q: A high-speed drill reaches 2500 rpm in 0.54 s. What is the drill's angular acceleration? Through how…

A: Convert 2500 rpm to rad/s.

Q: 2) A Ferris wheel has a radius of 9 m and rotates 4 times per minute. What is the linear velocity of…

Q: 4. (I) The blades in a blender rotate at a rate of 6500 rpm. When the motor is turned off during…

Q: A particle moves in a circle of radius 80 m with a constant speed of 30 m/s. (a) What is its angular…

Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

4. When a fan is turned off, its angular speed decreases from 168 rpm to 64.0 rpm in 6.08 s.
a) What is the angular acceleration of the fan?
b) How fast the edges of the blades are moving (in m/s) at time 6.08 s, if they are 86.0 cm
long?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

Integrated Concepts An ultracentrifuge accelerates from rest to 100,000 rpm in 2.00 min. (a) What is its angular acceleration in rad/s2? (b) What is the tangential acceleration of a point 9.50 cm from the axis of rotation? (c) What is the radial acceleration in m/s2 and multiples of g of this point at full rpm?
The dung beetle is known as one of the strongest animals for its size, often forming balls of dung up to 10 times their own mass and rolling them to locations where they can be buried and stored as food. A typical dung ball formed by the species K. nigroaeneus has a radius of 2.00 cm and is rolled by the beetle at 6.25 cm/s. (a) What is the rolling balls angular speed? (b) How many full rotations are required if the beetle rolls the ball a distance of 1.00 m?
Olympic ice skaters are able to spin at about 5 rev/s. (a) What is their angular velocity in radians per second? (b) What is the centripetal acceleration of the skater's nose if it is 0.120 m from the axis of rotation? (c) An exceptional skater named Dick Button was able to spin much faster in the 1950s than anyone since—at about 9 rev/s. What was the centripetal acceleration of the tip of his nose, assuming it is at 0.120 m radius? (d) Comment on the magnitudes of the accelerations found. It is reputed that Button ruptured small blood vessels during his spins.
A grindstone increases in angular speed uniformly from 4.00 rad/s to 12.0 rad/s in 4.00 s. (a) Calculate the grindstones angular acceleration. (b) Through what angle does it turn during that time? (See Section 7.2.)
A disk rotates about an axis through its center. Point A is located on its rim and point B is located exactly halfway between the center and the rim. What is the ratio of (a) the angular velocity A to that of B and (b) the tangential velocity vA to that of vB?
A playground merry-go-round has a mass of 120 kg and a radius of 1.80 m and it is rotating with an angular velocity of 0.500 rev/s. What is its angular velocity after a 22.0-kg child gets onto it by grabbing its outer edge? The child is initially at rest.
A shaft is turning at 65.0 rad/s at time t = 0. Thereafter, its angular acceleration is given by =10.05.00t where is in rad/s2 and t is in seconds. (a) Find the angular speed of the shaft at t = 3.00 s. (b) Through what angle does it turn between t = 0 and t = 3.00 s?
During a very quick stop, a car decelerates at 7.00 m/s2. (a) What is the angular acceleration of its 0.280-m-radius tires, assuming they do not slip on the pavement? (b) How many revolutions do the tires make before coming to rest, given their initial angular velocity is 95.0 rad/s? (c) How long does the car take to stop completely? (d) What distance does the car travel in this time? (e) What was the car's initial velocity? (f) Do the values obtained seem reasonable, considering that this stop happens very quickly?
The tub of a washer goes into its spin cycle, starting from rest and gaining angular speed steadily for 8.00 s, at which time it is turning at 5.00 rev/s. At this point, the person doing the laundry opens the lid, and a safety switch turns off the washer. The tub smoothly slows to rest in 12.0 s. Through how many revolutions does the tub turn while it is in motion?
Three children are riding on the edge of a merry-go-round that is 100 kg, has a 1.60-m radius, and is spinning at 20.0 rpm. The children have masses of 22.0, 28.0, and 33.0 kg. If the child who has a mass of 28.0 kg moves to the center of the merry-go-round, what is the new angular velocity in rpm?
Suppose a piece of dust finds itself on a CD. If the spin rate of the CD is 500 rpm, and the piece of dust is 4.3 cm from the center, what is the total distance traveled by the dust in 3 minutes? (Ignore accelerations due to getting the CD rotating.)
Human centrifuges are used to train military pilots and astronauts in preparation for high-g maneuvers. A trained, fit person wearing a g-suit can withstand accelerations up to about 9g (88.2 m/s2) without losing consciousness, (a) If a human centrifuge has a radius of 4.50 m, what angular speed results in a centripetal acceleration of 9g? (b) What linear speed would a person in the centrifuge have at this acceleration?