(a)
To find: The two forces in unit vectors.
(a)
Answer to Problem 77P
The force applied by person P is
Explanation of Solution
Given:
The force applied by person P is
The force applied by person J is
Formula used:
Write the expression for the horizontal component of force.
Write the expression for the vertical component of force.
Write the expression of force in terms of a unit vector.
Substitute
Here, F is the magnitude of the force,
Calculation:
For person P:
The direction of force is between the positive x-axis and the positive y-axis.
Substitute
For Person J:
The direction of force is between the negative x-axis and the positive y-axis.
Substitute
Conclusion:
Thus, the force applied by person P is
(b)
To write: The force applied by person C.
(b)
Answer to Problem 77P
The force applied by person C is
Explanation of Solution
Given:
The resultant of three forces equal to zero.
Formula used:
The force applied by person C should be equal and opposite to the resultant sum of forces applied by person P and person J.
Write the expression for the force applied by person C.
Here,
Calculation:
Substitute
Calculate the magnitude of force
Calculate the angle of force.
Conclusion:
Thus, the force applied by person Cis
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Chapter 1 Solutions
Physics for Scientists and Engineers
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