A disk with mass m = 8.8 kg and radius R = 0.36 m begins at...
A disk with mass m = 8.8 kg and radius R = 0.36 m begins at rest and accelerates uniformly for t = 16.5 s, to a final angular speed of ω = 31 rad/s.
1) What is the change in rotational energy of the disk?
2) What is the tangential component of the acceleration of a point on the rim of the disk when the disk has accelerated to half its final angular speed?
3) What is the magnitude of the radial component of the acceleration of a point on the rim of the disk when the disk has accelerated to half its final angular speed?
4) What is the final speed of a point on the disk half-way between the center of the disk and the rim?
5) What is the total distance a point on the rim of the disk travels during the 16.5 seconds?
Homework Answers
A disk with mass m = 8.6 kg and radius R = 0.35 m begins at...
A disk with mass m = 8.6 kg and radius R = 0.35 m begins at rest and accelerates uniformly for t = 18.9 s, to a final angular speed of ω = 29 rad/s. (answer all parts of this question please, thank you so so much) 1) What is the angular acceleration of the disk? 2) What is the angular displacement over the 18.9 s? 3) What is the moment of inertia of the disk? 4) What is the...
please help A uniform disk of radius 0.65 m rotates clockwise about its central axis and...
please help
A uniform disk of radius 0.65 m rotates clockwise about its central axis and accelerates with constant angular acceleration. At time 1-0 it is rotating at 34 rad/s, at timeに15 s later, its angular speed is 13 rad/s. (Recall 2π rad-1 rev). a. What is the direction of the angular velocity? b. What is the direction of the angular acceleration? c. Calculate the magnitude of the angular acceleration d. Through how many radians has the disk turned in...
A solid disk of mass m = 9.2 kg and radius R = 0.2 m is...
A solid disk of mass m = 9.2 kg and radius R = 0.2 m is rotating with a constant angular velocity of w = 38 rad/s. A thin rectangular rod with mass m2 = 3.7 kg and length L = 2R = 0.4 m begins at rest above the disk and is dropped on the disk where it begins to spin with the disk. 1) What is the initial angular momentum of the rod and disk system? kg-m2/s Submit...
A disk of radius 2.05 m rotates about its axis. Points on the disk\'s rim undergo...
A disk of radius 2.05 m rotates about its axis. Points on the disk\'s rim undergo tangential acceleration of magnitude 2.71 m/s2. At a particular time the rim has a tangential speed of 1.51 m/s. At a time 0.923 seconds later, what is the tangential speed, v, of a point on the rim, the magnitude of the point\'s radial acceleration, ar, and the magnitude of its total acceleration, atot?
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A flywheel with a radius of 0.220 m starts from rest and accelerates with a constant angular acceleration of 0.610 rad/s2 A. Compute the magnitude of the tangential acceleration, the radial acceleration, and the resultant acceleration of a point on its rim at the start B. Compute the magnitude of the tangential acceleration, the radial acceleration, and the resultant acceleration of a point on its rim after it has turned through 60.0 ∘ C. Compute the magnitude of the tangential...
A 0.6 m diameter solid disk with mass 4.2 kg is rotating with a constant angular...
A 0.6 m diameter solid disk with mass 4.2 kg is rotating with a constant angular velocity of 8t rad/sec. A) What is the tangential speed of a point 15. on the rim? B) Calculate the rotational kinetic energy of the wheel. rolling along a Find the total kinetic energy of the wheel in the previous problem if the wheel is now horizontal surface at 16 m/s. 16.
A flywheel with a radius of 0.600 m starts from rest and accelerates with a constant...
A flywheel with a radius of 0.600 m starts from rest and accelerates with a constant angular acceleration of 0.800 rad/s2 A) Compute the magnitude of the tangential acceleration of a point on its rim at the start. B) Compute the magnitude of the radial acceleration of a point on its rim at the start. D) Compute the magnitude of the tangential acceleration of a point on its rim after it has turned through 60.0 E) Compute the magnitude of...
A uniform disk of radius 0.455 m0.455 m and unknown mass is constrained to rotate about...
A uniform disk of radius 0.455 m0.455 m and unknown mass is
constrained to rotate about a perpendicular axis through its
center. A ring with the same mass as the disk is attached around
the disk's rim. A tangential force of 0.237 N0.237 N applied at the
rim causes an angular acceleration of 0.129 rad/s2.0.129 rad/s2.
Find the mass of the disk.Why is this wrong?
A uniform disk of radius 0.455 m and unknown mass is constrained to rotate about...
A disk 7.90 cm in radius rotates at a constant rate of 1 210 rev/min about...
A disk 7.90 cm in radius rotates at a constant rate of 1 210 rev/min about its central axis. (a) Determine its angular speed. rad/s (b) Determine the tangential speed at a point 2.96 cm from its center. m/s (c) Determine the radial acceleration of a point on the rim. magnitude directionSelect km/s (d) Determine the total distance a point on the rim moves in 1.92 s.
A disk-shaped merry-go-round of radius 2.13 m and mass 185 kg rotates freely with an angular...
A disk-shaped merry-go-round of radius 2.13 m and mass 185 kg rotates freely with an angular speed of 0.631 rev/s. A 59.4 kg person running tangential to the rim of the merry-go-round at 3.31 m/s jumps onto ts rim and holds on. Before jumping on the merry-go- round, the person was moving in the same direction as the merry-go-round's rim Part A What is the final angular speed of the merry-go-round? 2220 Symbols rad/s Submit Request Answer
please help
A uniform disk of radius 0.65 m rotates clockwise about its central axis and accelerates with constant angular acceleration. At time 1-0 it is rotating at 34 rad/s, at timeに15 s later, its angular speed is 13 rad/s. (Recall 2π rad-1 rev). a. What is the direction of the angular velocity? b. What is the direction of the angular acceleration? c. Calculate the magnitude of the angular acceleration d. Through how many radians has the disk turned in...
A solid disk of mass m = 9.2 kg and radius R = 0.2 m is rotating with a constant angular velocity of w = 38 rad/s. A thin rectangular rod with mass m2 = 3.7 kg and length L = 2R = 0.4 m begins at rest above the disk and is dropped on the disk where it begins to spin with the disk. 1) What is the initial angular momentum of the rod and disk system? kg-m2/s Submit...
A 0.6 m diameter solid disk with mass 4.2 kg is rotating with a constant angular velocity of 8t rad/sec. A) What is the tangential speed of a point 15. on the rim? B) Calculate the rotational kinetic energy of the wheel. rolling along a Find the total kinetic energy of the wheel in the previous problem if the wheel is now horizontal surface at 16 m/s. 16.
A uniform disk of radius 0.455 m0.455 m and unknown mass is
constrained to rotate about a perpendicular axis through its
center. A ring with the same mass as the disk is attached around
the disk's rim. A tangential force of 0.237 N0.237 N applied at the
rim causes an angular acceleration of 0.129 rad/s2.0.129 rad/s2.
Find the mass of the disk.Why is this wrong?
A uniform disk of radius 0.455 m and unknown mass is constrained to rotate about...
A disk 7.90 cm in radius rotates at a constant rate of 1 210 rev/min about its central axis. (a) Determine its angular speed. rad/s (b) Determine the tangential speed at a point 2.96 cm from its center. m/s (c) Determine the radial acceleration of a point on the rim. magnitude directionSelect km/s (d) Determine the total distance a point on the rim moves in 1.92 s.
A disk-shaped merry-go-round of radius 2.13 m and mass 185 kg rotates freely with an angular speed of 0.631 rev/s. A 59.4 kg person running tangential to the rim of the merry-go-round at 3.31 m/s jumps onto ts rim and holds on. Before jumping on the merry-go- round, the person was moving in the same direction as the merry-go-round's rim Part A What is the final angular speed of the merry-go-round? 2220 Symbols rad/s Submit Request Answer
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