2. True or False. Using two disks to transfer rotational motion is an efficient way to transfer rotational motion.
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- I keep getting wrong answers for this problem how do I do it? solving for angular acceleration19. An object of mass 6.0 kg moves at constant speed 5.0 m/s in a circular path of radius 2.0 m. (a) Calculate its kinetic energy by using K = ½ mv2. (b) Calculate the object’s angular speed and rotational inertia. (c) Calculate its kinetic energy by using K = ½ Iω2.1. Calculate the angular momentum and kinetic energy of an object rotating at 2.5 rad/s with a mass of 10. kg and a radius of 0.50 m given the following geometries: Solid cylinder Hollow cylinder Solid sphere Hollow sphere a. b. C. d.
- 2. A wheel of radius 20 cm is initially rotating at 12 rpm. It then speeds up at a constant rate, reaching a speed of 35 rpm after 3.1 seconds. a) What is the angular acceleration of the disk?2. Calculate the total Rotational Inertia of a Ring sandwiched between two Discs. Use a mass of 2.0 kg for all three objects. The two discs have a radius of 0.5 m, and the ring has inner and outer radii of 0.25 m and 0.45 m respectively.6. Find the angular momentum of Earth around the Sun. Also find the angular momentum of a rod about an axis passing through its edge. The length of the rod is 4 m and its mass is 500 g.
- 3. A disk accelerates from rest to an angular velocity of 600 rad/s in 3.0 s. (a) What constant angular acceleration does it have? (b) How many revolutions did you make in that time?An ice skater, whose rotational inertia is I = 4 kg·m2 with her arms close to her body, is spinning at 2 rad/s. She then fully extends her arms, changing her rotational inertia to 8 kg·m2. Which of the following is true? a.) Her angular momentum remains the same. b.) Her angular velocity decreases. c.) Her kinetic energy decreases. d.) All of the above. e.) B and C. d.) None of the above.4
- 31. Which of the following is true for angular motion? A uniform net torque always causes an increase in angular speed. A uniform net torque always changes the direction of the angular displacement vector. A uniform net torque always change the magnitude of the rotational inertia. A uniform net torque will always cause a change of angular momentum.4. An object travels a distance of 30 ft in 3 seconds as it moves along a path of radius 3ft. calculate for the linear and angular speed over the time period.5-