Concept explainers
(a)
The center of mass of the you-raft system from the end of the pier when you are at the very rear.
(a)
Answer to Problem 138P
The center of mass of the you-raft system from the end of the pier when you are at the very rear is at
Explanation of Solution
Given:
Length and mass of the raft are
Your mass is
Formula used:
The edge of the pier is taken as the origin and the right side of the pier is taken as positive
Figure:
In the figure
Figure:
The center of mass of the you-raft system (
Where,
Calculation:
By substituting numerical values in equation
Conclusion:
The center of mass of the you-raft system from the end of the pier when you are at the very rear is at
(b)
The center of mass of the you-raft system from the end of the pier when you are at front
(b)
Answer to Problem 138P
The center of mass of the you-raft system from the end of the pier when you are at front is at
Explanation of Solution
Formula used:
Where,
Calculation:
The distance of the raft from the pier after you have walked to the front of the raft is,
Because
Since,
Substituting
By substituting the numerical values in the above equation,
Substituting this value in equation (4),
Conclusion:
The center of mass of the you-raft system from the end of the pier when you are at front is at
(c)
The distance between you and the end of the pier when you are at the front of the raft.
(c)
Answer to Problem 138P
The distance between you and the end of the pier when you are at the front of the raft is at
Explanation of Solution
Formula used:
Where,
Calculation:
Substituting numerical values in equation in equation
Conclusion:
The distance between you and the end of the pier when you are at the front of the raft is at
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Chapter 5 Solutions
Physics for Scientists and Engineers
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