A particle performing uniform circular motion has angular momentum (L). If its angular frequency is doubled and its kinetic energy halved, momentum is : then the angular new (a) L/4 (b) L/2 (c) 2L (d) 4L
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- A uniform solid disk of mass m = 2.95 kg and radius r = 0.200 m rotates about a fixed axis perpendicular to its face with angular frequency 6.02 rad/s. (a) Calculate the magnitude of the angular momentum of the disk when the axis of rotation passes through its center of mass. ] kg • m²/s (b) What is the magnitude of the angular momentum when the axis of rotation passes through a point midway between the center and the rim? | kg - m²/ssend fast plzThe angular frequency of a rotating rigid body increases from 500 to 1500 rev/min in 120 s (a) What is the initial angular frequency? (b) What is the initial angular velocity? (c) What is the angular acceleration of the body? (d) Through what angle does it turn in this 120 s? For this question record the answer for (a)-(c). Initial angular frequency fo = [Select] Initial angular velocity wo [Select] Angular acceleration of the body a = [Select] <
- 21 g = 10 m/s^2A disk of mass M is spinning freely at 6.49 rad/s when a second identical disk, initially not spinning, is dropped onto it so that their axes coincide. In a short time the two disks are corotating. HINT (a) What is the angular speed of the new system (in rad/s)? rad/s (b) If a third such disk is dropped on the first two, find the final angular speed of the system (in rad/s). rad/sQ2
- The figure shows a rigid structure consisting of a circular hoop of radius R and mass m, and a square made of four thin bars, each of length R and mass m. The rigid structure rotates at a constant speed about a vertical axis, with a period of rotation of 2.4 s. If R = 1.7 m and m = 4.2 kg, calculate the angular momentum about that axis. Number Units R Rotation axis от 2R ོ་Momentum, P = (2.0 kg m/sec)î – (7.0 kg m/sec)ĵ acts on a particle with position vector 7 = (3. 0 m)î – (1. 0 m)ĵ. What are the angular momentum on the particle about the origin, in unit vector notation and the angle between 7 and P? If ř and P are working in Y and – Z direction respectively, what would be the direction of force?The total energy of rolling ring of mass 'm' and radius 'R' is (a) (c) (3/2) my² (b) mv² (d) DVERE (1/2) mv² (5/2) mv²
- What is the total kinetic energy of a spherical shell with a mass of 7.4 kg and radius of 23 cm rolling without slipping on a horizontal floor at a speed of 6.8 m/s? (in 3) A: 114 OB 171 OC: 285 OD: 2.16-10 OE 2.33×10 Submit Anwwer Tries 0/5 Post Discussion Send FeedbackA uniform solid disk of mass m = 2.95 kg and radius r= 0.200 m rotates about a fixed axis perpendicular to its face with angular frequency 5.98 rad/s. (a) Calculate the magnitude of the angular momentum of the disk when the axis of rotation passes through its center of mass. kg · m²/s (b) What is the magnitude of the angular momentum when the axis of rotation passes through a point midway between the center and the rim? kg - m²/sA uniform solid disk of mass m = 2.97 kg and radius r = 0.200 m rotates about a fixed axis perpendicular to its face with angular frequency 6.02 rad/s. (a) Calculate the magnitude of the angular momentum of the disk when the axis of rotation passes through its center of mass. kg • m2/s (b) What is the magnitude of the angular momentum when the axis of rotation passes through a point midway between the center and the rim? |kg · m2/s