Concept explainers
Part (a)
The maximum weight of a person who can walk to the extreme end D without tipping the beam.
Solution:
Maximum weight of person=
Part (a)
Explanation of Solution
Given:
Weight of the beam,
Length of the beam is 20.0 m.
Formula used:
Equilibrium condition: the net force and torque would be zero.
Calculation:
For not tipping, normal force at A is zero. Take the moment about point B.
Conclusion:
Thus, the maximum weight of the person who can walk to the extreme end D without tipping the beam is 650N.
Part (b)
The forces that the walls A and B exert on the beam when the same person is standing at point D
Part (b)
Answer to Problem 22P
Solution:
Explanation of Solution
Given:
Weight of the beam,
Length of the beam is 20.0 m.
Formula used:
Equilibrium condition: the net force and torque would be zero.
Calculation:
When the person moves to the point D, the beams tends to lose the contact A.
Conclusion:
Thus, the forces that the walls A and B exert on the beam when the same person is standing at point D are
Part (c)
The forces that the walls A and B exert on the beam when the same person is standing 2.0 m to the right of B .
Part (c)
Answer to Problem 22P
Solution:
Explanation of Solution
Given:
Weight of the beam,
Length of the beam is 20.0 m.
Formula used:
Equilibrium condition: the net force and torque would be zero.
Calculation:
Taking moment about point B:
Conclusion:
Thus, the forces that the walls A and B exert on the beam when the same person is standing at point D are
Chapter 9 Solutions
Physics: Principles with Applications
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