competition. Decide which CM5: You're taking part in a cheese-wheel-rolling-down-a-hill of the two given cheese wheels you will use to have the best chance of winning, and explain your decision using physics principles. You may make up reasonable values of r and L. Assume all cheese wheels have the same mass, feel the same friction, and have sufficient structural integrity to reach the bottom of the hill without falling apart. ( 2 L₂

competition. Decide which CM5: You're taking part in a cheese-wheel-rolling-down-a-hill of the two given cheese wheels you will use to have the best chance of winning, and explain your decision using physics principles. You may make up reasonable values of r and L. Assume all cheese wheels have the same mass, feel the same friction, and have sufficient structural integrity to reach the bottom of the hill without falling apart. ( 2 L₂

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter9: Statics And Torque

Section: Chapter Questions

Problem 2PE: When tightening a bolt, you push perpendicularly on a wrench with a force of 165 N at a distance of...

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Under what conditions can a rotating body be in equilibrium? Give an example.
Answer 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?
When tightening a bolt, you push perpendicularly on a wrench with a force of 165 N at a distance of 0.140 m from the center of the bolt. (a) How much torque are you exerting in newton meters (relative to the center of the bolt)? (b) Convert this torque to foot pounds.
A device for exercising the upper leg muscle is shown in Figure 9.39, together with a schematic representation of an equivalent lever system. Calculate the force exerted by the upper leg muscle to lift the mass at a constant speed. Explicitly show how you follow the steps in the Problem-Solving Strategy for static equilibrium in Applications of Statistics, Including Problem-Solving Strategies
Figure CQ10.15 shows a side view of a childs tricycle with rubber tires on a horizontal concrete sidewalk. If a string were attached to the upper pedal on the far side and pulled forward horizontally, the tricycle would start to roll forward. (a) Instead, assume a siring is attached to the lower pedal on the near side and pulled forward horizontally as shown by A. Will the tricycle start to roll? If so, which way? Answer the same questions if (b) the string is pulled forward and upward as shown by B, (c) if the string is pulled straight down as shown by C, and (d) if the string is pulled forward and downward as shown by D. (e) What If? Suppose the string is instead attached to the rim of the front wheel and pulled upward and backward as shown by E. Which way does the tricycle roll? (f) Explain a pattern of reasoning, based on the figure, that makes it easy to answer questions such as these. What physical quantity must you evaluate? Figure CQ10.15
You 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 P10.21
A group of physics students, each of whom can pull with 100lb of force, is planning to topple a 9600lb statue that the school built for the meanest teacher. Assume the statue does not slide. Answer all questions relative to the rotation point. How much torque is caused by the statue's weight? How much tension must the students generate to "barely balance" the statue? What is the minimum number of students (whole number) needed to topple the statue? nimum number of students (whole number) needed to topple the statue?
A- Inertia is mass. Rotational Inertial is mass and distance from the fulcrum (True or False) B-A torque on an object may cause the object to rotate. (True or False)
A horizontal turntable is rotating once every 2.5 seconds. The largest distance that the penny cna be from the center without sliding is 0.32 m. What is the coefficent of static friction between the disk and the penny?
A group of physics students, each of whom can pull with 100lb of force, is planning to topple a 9600lb statue that the school built for the meanest teacher. Assume the statue does not slide.Answer all questions relative to the rotation point. How much torque is caused by the statue's weight? How much tension must the students generate to "barely balance" the statue? What is the minimum number of students (whole number) needed to topple the statue?
A force couple tends to cause what ? 1-linear acceleration 2-angular acceleration 3-linear and angular acceleration
topic: rotation of rigid bodies A museum of modern art is displaying an irregular 426-N sculpture by hanging it from two thin vertical wires, A and B, that are 1.25 m apart. The center of gravity of this piece of art is 48.0 cm from its extreme right tip. Find the tension in each wire. the answer should be the one in the picture but i need a more detailed explanation please.