College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- On a playground, there is a merry-go-round. In order to get it moving, Bonnie applies a force of 17 N. The merry-go-round measures 5.3 m from the axis of rotation to the edge where Bonnie applies her force. Assuming she applies her force perpendicularly to a line drawn from the axis of rotation, what is the magnitude of the torque t Bonnie imparts to the merry-go-round? T = N.marrow_forwardA Ferris wheel rotates at an angular velocity of 0.26 rad/s. Starting from rest, it reaches its operating speed with an average angular acceleration of 0.026 rad/s2. How long does it take the wheel to come up to operating speed? sarrow_forward5. A block m= 5kg sits on a horizontal surface with coefficient of u = 0.2 between the block and the surface. A string runs from this block over a cylinder wheel of radius R = 10 cm and mass m, =2 kg and is attached to a hanging 7 kg friction mass. a. Find the acceleration of the masses, the angular acceleration of the wheel, and the tension in the string on each side. b. Use acceleration to find the velocity after block M moved down by h= 0.5m Marrow_forward
- A motor spins a disk (Idisk = 25.5 kg*m2) with a torque of 39 N*m, and a 18 N frictional force acts on the disk at a radius of 1.4 m. Attached to the disk at a radius of 6.6 m is a 13 kg mass. What is the magnitude of the angular acceleration in rad/s2 of the system?arrow_forwardIf you hold your arm outstretched with your palm upward, the force to keep your arm from falling comes from your deltoid muscle. Assume that the arm with hand has mass 4.25 kg and the distances and angles shown. What is the magnitude of the torque must the deltoid muscle provide to keep the arm in this position, in N·m? Use g = 10.0 m/s2. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.arrow_forwardAt a time of 13D0 seconds the tires of a moving motorcycle are rotating with an unknown initial angular velocity, at that instant each tire starts accelerating with an angular acceleration of 3.00 rev/s2 for 5.00 seconds. Each tire turns through 50.0 revolutions in those 5.00 seconds. Assume the motorcycles tires have a radius of 36.0 cm and that the tires rotate without slipping relative to the road surface. How fast is the motorcycle traveling at t=5.0s?arrow_forward
- An automobile engine can produce 253 Nm of torque. Calculate the angular acceleration (in rad/s2) produced if 80.2% of this torque is applied to the drive shaft, axle, and rear wheels of a car, given the following information. The car is suspended so that the wheels can turn freely. Each wheel acts like a 15.0 kg disk that has a 0.180 m radius. The walls of each tire act like a 2.00 kg annular ring that has inside radius of 0.180 m and outside radius of 0.320 m. The tread of each tire acts like a 10.0 kg hoop of radius 0.330 m. The 12.1 kg axle acts like a rod that has a 2.00 cm radius. The 29.7 kg drive shaft acts like a rod that has a 3.20 cm radius. rad/s² t Additional Materials Readingarrow_forwardAn 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 F3arrow_forwardA force in the +y direction applied at the point x = 8.1 m, y = 8.1 m gives rise to a torque of 63.7 Nm about the origin. Determine the magnitude of the force. Express your answer in N, to at least one digit after the decimal point. plz help use g = 9.8arrow_forward
- A motor spins a disk (Idisk = 25.1 kg*m2) with a torque of 40 N*m, and a 18 N frictional force acts on the disk at a radius of 1.5 m. Attached to the disk at a radius of 2.6 m is a 17 kg mass. What is the magnitude of the angular acceleration in rad/s2 of the system?arrow_forwardA 1.0 kg ball and a 2.0 kg ball are connected by a 1.1-m-long rigid, massless rod. The rod is rotating cw about its center of mass at 20 rpm. What torque will bring the balls to a halt in 5.6 s? Express your answer in newton-meters to two significant figures. ΠΑΣΦ T = ? N.marrow_forwardProblem 1: A small rubber wheel is used to drive a large pottery wheel. The two wheels are mounted so that their circular edges touch. The small wheel has a radius of 6.5 cm and accelerates at the rate of 7.5 rad/s2 , and it is in contact with the pottery wheel (radius 24.0 cm ) without slipping. Part A Calculate the angular acceleration of the pottery wheel. Part B Calculate the time it takes the pottery wheel to reach its required speed of 70 rpm .arrow_forward
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