COLLEGE PHYS. VOL 1 LLF W/MODMAST >IC<
10th Edition
ISBN: 9781323149454
Author: YOUNG
Publisher: PEARSON C
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Textbook Question
Chapter 10, Problem 71PP
A doubling of the torque produces a greater
- A. Increasing the pulley diameter by a factor of 2
- B. Increasing the pulley diameter by a factor of 2
- C. Increasing the pulley diameter by a factor of 4
- D. Decreasing the pulley diameter by a factor of 2
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COLLEGE PHYS. VOL 1 LLF W/MODMAST >IC<
Ch. 10 - When tightening a bolt, mechanics sometimes extend...Ch. 10 - Prob. 2CQCh. 10 - Two identical uniform 30 cm bricks are placed one...Ch. 10 - (a) If the forces on an object balance, do the...Ch. 10 - (a) Can you change the location of your bodys...Ch. 10 - Serious bicyclists say that if you reduce the...Ch. 10 - Prob. 7CQCh. 10 - In terms of torques, discuss the action of a claw...Ch. 10 - Why is a tapered water glass with a narrow base...Ch. 10 - True or false? In picking an axis about which to...
Ch. 10 - Global warming. As the earths climate continues to...Ch. 10 - If two spinning objects have the same angular...Ch. 10 - You are designing a wheel that must have a fixed...Ch. 10 - Prob. 2MCPCh. 10 - A student is sitting on a frictionless rotating...Ch. 10 - If the torques on an object balance, then it...Ch. 10 - If the forces on an object balance, then it...Ch. 10 - Prob. 6MCPCh. 10 - A person pushes vertically downward with force P...Ch. 10 - String is wrapped around the outer rim of a solid...Ch. 10 - A ball of mass 0.20 kg is whirled in a horizontal...Ch. 10 - A heavy solid disk rotating freely and slowed only...Ch. 10 - A uniform metal meterstick is balanced as shown in...Ch. 10 - Prob. 1PCh. 10 - Calculate the net torque about point O for the two...Ch. 10 - Three forces are applied to a wheel of radius...Ch. 10 - A 4 N and a 10 N force act on an object. The...Ch. 10 - A square metal plate 0.180 m on each side is...Ch. 10 - A cord is wrapped around the rim of a wheel 0.250...Ch. 10 - A certain type of propeller blade can be modeled...Ch. 10 - A 750 g grinding wheel 25.0 cm in diameter is in...Ch. 10 - A grindstone in the shape of a solid disk with...Ch. 10 - A solid, uniform cylinder with mass 8.00 kg and...Ch. 10 - A 2.00 kg stone is tied to a thin, light wire...Ch. 10 - A light rope is wrapped several times around a...Ch. 10 - A thin, light string is wrapped around the rim of...Ch. 10 - 14. A uniform, 8.40-kg, spherical shell 50.0 cm in...Ch. 10 - A hollow spherical shell with mass 2.00 kg rolls...Ch. 10 - A solid disk of radius 8.50 cm and mass 1.25 kg,...Ch. 10 - What is the power output in horsepower of an...Ch. 10 - A solid uniform sphere of mass 5 kg and radius 0.1...Ch. 10 - A playground merry-go-round has a radius of 4.40 m...Ch. 10 - The flywheel of a motor has a mass of 300.0 kg and...Ch. 10 - Calculate the angular momentum and kinetic energy...Ch. 10 - (a) Calculate the magnitude of the angular...Ch. 10 - A small 0.300 kg bird is flying horizontally at...Ch. 10 - A. small 4.0 kg brick is released from rest 2.5 m...Ch. 10 - The London Eye is the tallest Ferris wheel in...Ch. 10 - A certain drawbridge can be modeled as a uniform...Ch. 10 - On an old-fashioned rotating piano stool, a woman...Ch. 10 - The spinning figure skater. The outstretched hands...Ch. 10 - A small block on a frictionless horizontal surface...Ch. 10 - A uniform 2 kg solid disk of radius R 0.4 m is...Ch. 10 - A diver comes off a board with arms straight up...Ch. 10 - A large turntable rotates about a fixed vertical...Ch. 10 - A large wooden turntable in the shape of a flat...Ch. 10 - Which of the objects shown in Figure 10.55 are in...Ch. 10 - (a) In each of the objects in Figure 10.56, what...Ch. 10 - Prob. 36PCh. 10 - Prob. 37PCh. 10 - Prob. 38PCh. 10 - Prob. 39PCh. 10 - Prob. 40PCh. 10 - The horizontal beam in Figure 10.60 weighs 150 N,...Ch. 10 - The boom in Figure 10.61 weighs 2600 N and is...Ch. 10 - A uniform ladder 7.0 m long weighing 450 N rests...Ch. 10 - A 9.0 m uniform beam is hinged to a vertical wall...Ch. 10 - A uniform beam 4.0 m long and weighing 2500 N...Ch. 10 - A diving board 3.00 m long is supported at a point...Ch. 10 - Two people carry a heavy electric motor by placing...Ch. 10 - Pumping iron. A 72.0 kg weightlifter is doing arm...Ch. 10 - The deltoid muscle. The deltoid muscle is the main...Ch. 10 - The rotor (flywheel) of a toy gyroscope has a mass...Ch. 10 - For each of the following rotating objects,...Ch. 10 - Prob. 52GPCh. 10 - A good workout. You are doing exercises on a...Ch. 10 - Prior to being placed in its hole, a 5700 N,...Ch. 10 - Prob. 55GPCh. 10 - One end of a 1.2-m-long beam is hinged to a...Ch. 10 - The farmyard gate. A gate 4.00 m wide and 2.00 m...Ch. 10 - 58. Atwoods machine. Figure 10.72 illustrates an...Ch. 10 - Prob. 59GPCh. 10 - The forces on the foot. A 750 N athlete standing...Ch. 10 - A uniform solid cylinder of mass M is supported on...Ch. 10 - Prob. 62GPCh. 10 - You are trying to raise a bicycle wheel of mass m...Ch. 10 - An experimental bicycle wheel is placed on a test...Ch. 10 - Prob. 65GPCh. 10 - Disks A and B are mounted on shaft SS and may be...Ch. 10 - One end of a thin, uniform rod is connected to a...Ch. 10 - A uniform, 7.5-m-long beam weighing 9000 N is...Ch. 10 - Human moment of inertia. The moment of inertia of...Ch. 10 - While the turntable is being accelerated, the...Ch. 10 - A doubling of the torque produces a greater...Ch. 10 - If the bodys center of mass were not placed on the...Ch. 10 - Torques and tug-of-war. In a study of the...Ch. 10 - If the competitor leans slightly farther back...Ch. 10 - Torques and tug-of-war. In a study of the...
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- (a) Give an example in which the net force acting on an object is zero and yet the net torque is nonzero, (h) (five an example in which the net torque acting on an object is zero and yet the net force is nonzero.arrow_forwardA simple pendulum consists of a small object of mass 3.0 kg hanging at the end of a 2.0-m-long light string that is connected to a pivot point. (a) Calculate the magnitude of the torque (due to the force of gravity) about this pivot point when the string makes a 5.0 angle with the vertical. (b) Does the torque increase or decrease as the angle increases? Explain. Figure P8.6arrow_forwardAnswer yes or no 10 (he following questions, (a) Is it possible to calculate the torque acting on a rigid object without specifying an axis of rotation? (b) Is the torque independent of the location of the axis of rotation?arrow_forward
- Two children are playing with a roll of paper towels. One child holds the roll between the index fingers of her hands so that it is free to rotate, and the second child pulls at constant speed on the free end of the paper towels. As the child pulls the paper towels, the radius of the roll of remaining towels decreases. (a) How does the torque on the roll change with time? (b) How does the angular speed of the roll change in time? (c) If the child suddenly jerks the end paper towel with a large force, is the towel more likely to break from the others when it is being pulled from a nearly full roll or from a nearly empty roll?arrow_forward(a) Is it possible to calculate the torque acting on a rigid object without specifying an origin? (b) Is the torque independent of the location of the origin?arrow_forwardThe fishing pole in Figure P10.28 makes an angle of 20.0 with the horizontal. What is the torque exerted by the fish about an axis perpendicular to the page and passing through the anglers hand if the fish pulls on the fishing line with a force F = 100 N at an angle 37.0 below the horizontal? The force is applied at a point 2.00 in from the anglers hands.arrow_forward
- Explain why changing the axis of rotation of an object changes it s moment of inertia.arrow_forwardYou have just bought a new bicycle. On your first riding trip, it seems that the hike comes to rest relatively quickly after you stop pedaling and let the bicycle coast on flat ground. You call the bicycle shop from which you purchased the vehicle and describe the problem. The technician says that they will replace the bearings in the wheels or do whatever else is necessary if you can prove that the frictional torque in the axle of the wheels is worse than 0.02 N m. At first, you are discouraged by the technical sound of what you have been told and by the absence of any tool to measure torque in your garage. But then you remember that you are taking a physics class! You take your bike into the garage, turn it upside down and start spinning the wheel while you think about how to determine the frictional torque. The driveway outside the garage had a small puddle, so you notice that droplets of water are flying off the edge of one point on the tire tangentially, including drops that are projected straight upward, as shown in Figure P10.21. Ah-ha! Here is your torque-measuring method! The upward-projected drops leave the rim of the wheel at the same level as the axle. You measure the height to which a drop rises from the level of the axle: h1 = 54.0 cm. The wet spot on the tire makes one revolution and another drop is projected upward. You measure its highest point: h2 = 51.0 cm. You measure the radius of the wheel: r = 0.381 m. Finally, you take the wheel off the bike and find its mass: m = 0.850 kg. Because most of the mass of the wheel is at the tire, you model the wheel as a hoop. What do you tell the technician when you call back? Figure P10.21arrow_forwardA bar on a hinge starts from rest and rotates with an angular acceleration = 10 + 6t, where is in rad/s2 and t is in seconds. Determine the angle in radians through which the bar turns in the first 4.00 s.arrow_forward
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