A beam resting on two pivots has a length of L = 6.00 m and mass M = 87.0 kg. The pivot under the left end exerts a normal force n, on the beam, and the second pivot placed a distance { = 4.00 m from the left end exe n2. A woman of mass m 61.0 kg steps onto the left end of the beam and begins walking to the right as in the figure below. The goal is to find the woman's position when the beam begins to tip. (a) Sketch a free-body diagram, labeling the gravitational and normal forces acting on the beam and placing the woman x meters to the right of the first pivot, which is the origin. (Submit a file with a maximum siz Choose File no file selected This answer has not been graded yet. (b) Where is the woman when the normal force n, is the greatest? X = 0 (c) What is n, when the beam is about to tip? (d) Use the force equation of equilibrium to find the value of n, when the beam about to tip. 1450.4 (e) Using the result of part (c) and the torque equilibrium equation, with torques computed around the second pivot point, find the woman's position when the beam is about to tip. X = 5.426 v m (f) Check the answer to part (e) by computing torques around the first pivot point. X = 0 The correct answer is not zero. m Except for possible slight differences due to rounding, is the answer the same? O Yes C No
A beam resting on two pivots has a length of L = 6.00 m and mass M = 87.0 kg. The pivot under the left end exerts a normal force n, on the beam, and the second pivot placed a distance { = 4.00 m from the left end exe n2. A woman of mass m 61.0 kg steps onto the left end of the beam and begins walking to the right as in the figure below. The goal is to find the woman's position when the beam begins to tip. (a) Sketch a free-body diagram, labeling the gravitational and normal forces acting on the beam and placing the woman x meters to the right of the first pivot, which is the origin. (Submit a file with a maximum siz Choose File no file selected This answer has not been graded yet. (b) Where is the woman when the normal force n, is the greatest? X = 0 (c) What is n, when the beam is about to tip? (d) Use the force equation of equilibrium to find the value of n, when the beam about to tip. 1450.4 (e) Using the result of part (c) and the torque equilibrium equation, with torques computed around the second pivot point, find the woman's position when the beam is about to tip. X = 5.426 v m (f) Check the answer to part (e) by computing torques around the first pivot point. X = 0 The correct answer is not zero. m Except for possible slight differences due to rounding, is the answer the same? O Yes C No
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter10: Rotational Motion
Section: Chapter Questions
Problem 28P: A uniform beam resting on two pivots has a length L = 6.00 m and mass M = 90.0 kg. The pivot under...
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please help on part f. (see pic attached)
Transcribed Image Text:A beam resting on two pivots has a length of L = 6.00 m and mass M = 87.0 kg. The pivot under the left end exerts a normal force n, on the beam, and the second pivot placed a distance { = 4.00 m from the left end exerts a normal force
n. A woman of mass m = 61.0 kg steps onto the left end of the beam and begins walking to the right as in the figure below. The goal is to find the woman's position when the beam begins to tip.
m
M
(a) Sketch a free-body diagram, labeling the gravitational and normal forces acting on the beam and placing the woman x meters to the right of the first pivot, which is the origin. (Submit a file with a maximum size of 1 MB.)
Choose File
no file selected
This answer has not been graded yet.
(b) Where is the woman when the normal force n, is the greatest?
X = 0
(c) What is n1
when the beam is about to tip?
(d) Use the force equation of equilibrium to find the value of n, when the beam is about to tip.
1450.4
(e) Using the result of part (c) and the torque equilibrium equation, with torques computed around the second pivot point, find the woman's position when the beam is about to tip.
X = 5.426
(f) Check the answer to part (e) by computing torques around the first pivot point.
X = 0
The correct answer is not zero. m
Except for possible slight differences due to rounding, is the answer the same?
Yes
No
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