A stone of mass 100 g is whirled in a horizontal circle at the end of a cord 1 m long. If the tension in the cord is 2.5 N, estimate the angular speed of the stone? O a. 6 rad/s Ob. 5 rad/s O c. 4 rad/s od. 7 rad/s
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- A merry-go-round is a common piece of playground equipment. A 5 m diameter (that's diameter) merry-go-round rotates frictionlessly. It has a mass of 166 kg and is spinning at 22 rpm (that's revolutions/minute... you will want to convert to radians/sec). John runs tangent to the merry-go-round at 2.5 m/s in the same direction that it is turning. John's mass is 27 kg. He then jumps onto the MGR and sits halfway between the outer edge and the center. A)What is the rotational inertia of the merry-go-round (consider it a disk)? B)What is the initial rotational inertia of John (consider him a point mass). C)What is the initial angular momentum, Lmgr, of the merry-go-round? (D)What is the initial angular momentum, LJ, of John? (E)What is the total initial angular momentum of the system? (F)Use Conservation of Angular Momentum to find the final angular speed of the merry-go-round?A person sits in a chair that is free to rotate without friction. Intheir hands, they hold two masses: Mass m1 = 5.0 kg a distance r1 = 0.35m from their body and mass m2 = 3.0 kg a distance r2 = 0.75 m from their body. a. At what distance r1 should the person hold mass m1 if they want to change their rotation speed from w1 = 8.0 rad/s to wf = 5.0 rad/s? b. What is the new moment of inertia about the vertical axis when m1 is held at this new distance?Ā CEEE pletion Status: QUESTION 22 The coordinate of an object is given as a function of time by 0 = 7t-32, where 0 is in radians and it is in seconds. Its angular velocity at t = 3 s is: OA. 1.0 rad/s OB.-11 rad/s OC.-3.7 rad/s OD. 11 rad/s OE. 3.7 rad/s ings to the same rod and rotate around it, as shown below. Rank the balls according to their rotational
- A lawnmower blade has a length of 0.75 m and a mass of 1.5 kg. The blade rotates around its center at an angular velocity of 500??????500revmin. The initial angular velocity of the lawnmower blade is Answer ????rads.A grinding wheel 0.33 m in diameter rotates at 2900 rpm . a) What is the linear speed of a point on the edge of the grinding wheel? b) What is the acceleration of a point on the edge of the grinding wheel?Plz use g = 9.8 m/s2 to find if needed
- Kacey is learning how to figure skate. She is spinning with her arms out, each arm is .5 m, with an angular velocity of 2 rad/s. Her teacher tells her to pull in her arms for a total radius of 0.15 m. What is her angular velocity?A merry-go-round turns at a constant rate of 6 complete rotations per minute. What is its angular speed in radians per second? A. 6л rad/s B. π/10 rad/s С. π/5 rad/s D. 6.0 rad/s O A OBAn optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad/s). If a particular disk is spun at 968.7 rad/s while it is being read, and then is allowed to come to rest over 0.301 seconds, what is the magnitude of the average angular acceleration of the disk? rad average angular acceleration: s2 If the disk is 0.12 m in diameter, what is the magnitude of the tangential acceleration of a point 1/7 of the way out from the center of the disk? m tangential acceleration: s2 about us privacy policy terms of use contact us help careers tv W MacBook Air F12 F10 F9 80 000 000 F4 F3