1.A flywheel rotating at 12 rev/s is brought to rest in 5 s. The magnitude of...
1.A flywheel rotating at 12 rev/s is brought to rest in 5 s. The magnitude of the average angular acceleration in rad/s2 of the wheel during this process is:
2.The coefficient of static friction between a certain cylinder and a horizontal floor is 0.50. If the rotational inertia of the cylinder about its symmetry axis is given by I = (1/2)MR2, then the magnitude of the maximum acceleration in m/s2 the cylinder can have without sliding is:
3.A playground merry-go-round has a radius of 3.0 m and a rotational inertia of 600 kgˑm2. It is initially spinning at 0.80 rad/s when a 20 kg child crawls from the center to the rim. When the child reaches the rim the angular velocity of the merry-go-round in rad/s is:
Homework Answers
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1.A flywheel rotating at 12 rev/s is brought to rest in 5 s. The
magnitude of...
D. 3 m/s 10. A spring gun is used to project a 106 g mass horizontally...
D. 3 m/s 10. A spring gun is used to project a 106 g mass horizontally across a frictionless surface. The spring is compressed 4.5 cm and has a spring constant of 33 N/m. What is the initial magnitude of the acceleration of the mass the nstant the spring gun fires? A. 140 m/s2 B. 14 m/s2 C. 28 m/s2 D. 1.4 m/s2 11. A kid of mass 20 kg is at the center of a playground merry-go-round that is...
1.A playground merry-go-round has a radius of 3.0 m and a rotational inertia of 600 kgˑm2....
1.A playground merry-go-round has a radius of 3.0 m and a
rotational inertia of 600 kgˑm2. It is initially
spinning at 0.80 rad/s when a 20 kg child crawls from the center to
the rim. When the child reaches the rim the angular velocity of the
merry-go-round in rad/s is:
2.A picture P of weight W = 40 N is hung by two strings as
shown. The magnitude of the tension force
of each string is T and θ=30°. The...
A flywheel with a diameter of 1.60 m is rotating at an angular speed of 320...
A flywheel with a diameter of 1.60 m is rotating at an angular speed of 320 rev/min. (a) What is the angular speed of the flywheel in rad/s? rad/s (b) What is the linear speed of a point on the rim of the flywheel? m/s (c) What constant angular acceleration (in revolutions per minute-squared) will increase the wheel's angular speed to 1000 rev/min in 60 s? rev/min2 (d) How many revolutions does the wheel make during this 60 s acceleration?...
A play ground merry go round has a radius of 3.0 m and a rotational inertia...
A play ground merry go round has a radius of 3.0 m and a rotational inertia of 600 kg x m2. A 25 g child pushes and jumps on the edge. it is then spinning at 0.80 rad/s. the child then crawls from the rim to the very center of the merry go round. Now how fast does it spin?
A flywheel with a diameter of 0.679 m is rotating at an angular speed of 221...
A flywheel with a diameter of 0.679 m is rotating at an angular speed of 221 rev/min. (a) What is the angular speed of the flywheel in radians per second? (b) What is the linear speed of a point on the rim of the flywheel? (c) What constant angular acceleration (in revolutions per minute-squared) will increase the wheel's angular speed to 730 rev/min in 68.5 s? (d) How many revolutions does the wheel make during that 68.5 s? (a is...
Chapter 10, Problem 030 GO A gyroscope flywheel of radius 2.35 cm is accelerated from rest...
Chapter 10, Problem 030 GO A gyroscope flywheel of radius 2.35 cm is accelerated from rest at 12.7 rad/s2 until its angular speed is 2790 rev/min. (a) What is the tangential acceleration of a point on the rim of the flywheel during this spin-up process? (b) What is the radial acceleration of this point when the flywheel is spinning at full speed? (c) Through what distance does a point on the rim move during the spin-up?
a. 1.21 rad/s b. 0.829 rad/s c. 2.95 rad/s d. 0.229 rad/s e. 0.829 rad/s A...
a. 1.21 rad/s
b. 0.829 rad/s
c. 2.95 rad/s
d. 0.229 rad/s
e. 0.829 rad/s
A playground merry-go-round of radius R = 2.10 m has a moment of inertia of I = 260 kgm2 and is rotating at 11.0 rev/min about a frictionless vertical axis. Facing the axle, a 23.0 kg child hops on to the merry-go-round and manages to sit down on its edge. What is the new angular speed of the merry-go-round?
A child pushes her friend (m = 25 kg) located at a radius r = 1.5...
A child pushes her friend (m = 25 kg) located at a radius r = 1.5 m on a merry-go-round (rmgr = 2.0 m, Imgr = 1000 kg*m2) with a constant force F = 90 N applied tangentially to the edge of the merry-go-round (i.e., the force is perpendicular to the radius). The merry-go-round resists spinning with a frictional force of f = 10 N acting at a radius of 1 m and a frictional torque τ = 15 N*m...
PLEASE HELP -1. A flywheel rotating counterclockwise at 300 RPM takes 10.0 s to stop after...
PLEASE HELP
-1. A flywheel rotating counterclockwise at 300 RPM takes 10.0 s to stop after it is switched off. a. Find the angular acceleration of the flywheel in rad/s2, assuming it is constant. (Show work, watch signs.) (12 points) b. How many revolutions does the flywheel make before stopping? (12 points) c. If the rotational inertia of the flywheel is 5.52 kg.m2 about its axle, find the frictional torque that stops the flywheel. (Show work, watch signs.) (12 points)
1) The flywheel of a steam engine begins to rotate from rest with a constant angular...
1) The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.23 rad/s2. It accelerates for 22.7 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 57.7 s after it begins rotating. Hint:This is rotational motion, with equations for angles similar to those for linear motion. Note that the TOTAL time is given. Answer: ______ deg. 2) A proposed space station includes living quarters in...
D. 3 m/s 10. A spring gun is used to project a 106 g mass horizontally across a frictionless surface. The spring is compressed 4.5 cm and has a spring constant of 33 N/m. What is the initial magnitude of the acceleration of the mass the nstant the spring gun fires? A. 140 m/s2 B. 14 m/s2 C. 28 m/s2 D. 1.4 m/s2 11. A kid of mass 20 kg is at the center of a playground merry-go-round that is...
1.A playground merry-go-round has a radius of 3.0 m and a
rotational inertia of 600 kgˑm2. It is initially
spinning at 0.80 rad/s when a 20 kg child crawls from the center to
the rim. When the child reaches the rim the angular velocity of the
merry-go-round in rad/s is:
2.A picture P of weight W = 40 N is hung by two strings as
shown. The magnitude of the tension force
of each string is T and θ=30°. The...
a. 1.21 rad/s
b. 0.829 rad/s
c. 2.95 rad/s
d. 0.229 rad/s
e. 0.829 rad/s
A playground merry-go-round of radius R = 2.10 m has a moment of inertia of I = 260 kgm2 and is rotating at 11.0 rev/min about a frictionless vertical axis. Facing the axle, a 23.0 kg child hops on to the merry-go-round and manages to sit down on its edge. What is the new angular speed of the merry-go-round?
PLEASE HELP
-1. A flywheel rotating counterclockwise at 300 RPM takes 10.0 s to stop after it is switched off. a. Find the angular acceleration of the flywheel in rad/s2, assuming it is constant. (Show work, watch signs.) (12 points) b. How many revolutions does the flywheel make before stopping? (12 points) c. If the rotational inertia of the flywheel is 5.52 kg.m2 about its axle, find the frictional torque that stops the flywheel. (Show work, watch signs.) (12 points)
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