Concept explainers
(a)
The distance and the direction in which H should travel to return to his starting point.
(a)
Answer to Problem 91P
H should travel
Explanation of Solution
The travel of H is sketched in figure 1.
Compute the displacement using the component method.
Write the equation for displacement in
Here,
Refer to figure 1 and write the values of
Put the value of
Write the equation for displacement in
Here,
Refer to figure 1 and write the values of
Put the value of
Write the equation for the magnitude of the net displacement.
Here,
Write the equation for the direction of net displacement.
Conclusion:
Substitute
Substitute
Both the components are negative so that
H must travel in the opposite direction to return to his starting point.
Therefore, H should travel
(b)
The time taken for the trip of H if he returns directly to his return point with a speed of
(b)
Answer to Problem 91P
The time taken for the trip of H if he returns directly to his return point with a speed of
Explanation of Solution
Write the equation for the time taken.
Here,
Conclusion:
Substitute
Therefore, the time taken for the trip of H if he returns directly to his return point with a speed of
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