A person is standing on a level floor. His head, upper torso, arms, and hands together weigh 438 N and have a center of gravity that is 1.30 m above the floor. His upper legs weigh 144 N and have a center of gravity that is 0.730 m above the floor. Finally, his lower legs and feet together weigh 87 N and have a center of gravity that is 0.240 m above the floor. Relative to the floor, find the location of the center of gravity for his entire body. m above the floor

A person is standing on a level floor. His head, upper torso, arms, and hands together weigh 438 N and have a center of gravity that is 1.30 m above the floor. His upper legs weigh 144 N and have a center of gravity that is 0.730 m above the floor. Finally, his lower legs and feet together weigh 87 N and have a center of gravity that is 0.240 m above the floor. Relative to the floor, find the location of the center of gravity for his entire body. m above the floor

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter8: Rotational Equilibrium And Rotational Dynamics

Section: Chapter Questions

Problem 79AP

See similar textbooks

Similar questions

A bridge of length 50.0 m and mass 8.00 104 kg is supported on a smooth pier at each end as shown in Figure P12.25. A truck of mass 3.00 104 kg is located 15.0 m from one end. What are the forces on the bridge at the points of support? Figure P12.25
A wooden door 2.1 m high and 0.90 m wide is hung by two hinges 1.8 m apart. The lower hinge is 15 cm above the bottom of the door. The center of mass of the door is at its geometric center, and the weight of the door is 260 N, which is supported equally by both hinges. Find the horizontal force exerted by each hinge on the door.
A uniform beam resting on two pivots has a length L = 6.00 m and mass M = 90.0 kg. The pivot under the left end exerts a normal force n1 on the beam, and the second pivot located a distance = 4.00 m from the left end exerts a normal force n2. A woman of mass m = 55.0 kg steps onto the left end of the beam and begins walking to the right as in Figure P10.28. The goal is to find the womans position when the beam begins to tip. (a) What is the appropriate analysis model for the beam before it begins to tip? (b) Sketch a force diagram for the beam, labeling the gravitational and normal forces acting on the beam and placing the woman a distance x to the right of the first pivot, which is the origin. (c) Where is the woman when the normal force n1 is the greatest? (d) What is n1 when the beam is about to tip? (e) Use Equation 10.27 to find the value of n2 when the beam is about to tip. (f) Using the result of part (d) and Equation 10.28, with torques computed around the second pivot, find the womans position x when the beam is about to tip. (g) Check the answer to part (e) by computing torques around the first pivot point. Figure P10.28
A uniform bridge span weighs 50 103 N and is 40.0 m long. An automobile weighing 15 103N is parked with its center of gravity located 12.0 m from the right pier. Where is the center of mass of the bridge-automobile combination located as measured from the left pier?
A person is standing on a level floor. His head, upper torso, arms, and hands together weigh 471 N and have a center of gravity that is 1.29 m above the floor. His upper legs weigh 154 N and have a center of gravity that is 0.761 m above the floor. Finally, his lower legs and feet together weigh 87.2 N and have a center of gravity that is 0.235 m above the floor. Relative to the floor, find the location of the center of gravity for the entire body.
A person carries a plank of wood 2.0 m long with one hand pushing down on it at one end with a force F1 and the other hand holding it up at 50 cm from the end of the plank with force F2. f the plank has a mass of 19 kg and its center of gravity is at the middle of the plank, what is the force F2, in newtons? If the plank has a mass of 19 kg and its center of gravity is at the middle of the plank, what is the force F1, in newtons?
A 1.90-m-long barbell has a 21.0 kg weight on its left end and a 32.0 kg weight on its right end. If you ignore the weight of the bar itself, how far from the left end of the barbell is the center of gravity? Express your answer to three significant figures and include the appropriate units. Where is the center of gravity if the 9.00 kg mass of the barbell itself is taken into account? Express your answer to three significant figures and include the appropriate units.
the horizontal arm is composed of 3 parts. the upper arm weight is 17.5N and the distance from the shoulder joint is o m. the lower arm weight is 10 N and the distance from the shoulder is 0.37m. the hand wegth is 3.80 N and the distant from the shoulder is 0.58. find the center of gravity of the entire arm relative to the shoulder joint?
A person’s weight is 438 N is standing on a level floor and have a center of gravity that is 1.28 m above the floor. His upper legs weigh 150 N and have a center of gravity that is 0.760 m above the floor. Finally, his lower legs and feet together weigh 87 N and have a center of gravity that is 0.280 m above the floor. Assuming his body arrangement standing is vertical. Relative to the floor, find the location of the center of gravity for his entire body.
A uniform rod is 2.00 m long and has mass 1.80 kg. A 2.40 kg clamp is attached to the rod. How far should the center of gravity of the clamp be from the left-hand end of the rod in order for the center of gravity of the composite object to be 1.20 m from the left-hand end of the rod?
A father and his daughter are playing a see-saw made of a plank of length 5.1 m and of weight 118 N in a park. If the daughter weights 274 N and sits at one edge of the plank, where the father with a weight of 523 N should sits from the pivot point to balance the see-saw in m, assuming that the plank has uniform density? Keep three significant figures.
Two children of mass 15 kg and 35 kg sit balanced on a seesaw with the pivot point located at the center of the seesaw. If the children are separated by a distance of 3.0 m, at what distance, in meters, from the pivot point is the smaller child sitting in order to maintain the balance?