Concept explainers
(a)
The maximum height reached by the rock.
(a)
Answer to Problem 20P
The maximum height reached by the rock is
Explanation of Solution
Write the equation of motion.
Here,
Conclusion:
Substitute
Therefore the maximum height of the rock reach is
(b)
The time required by the rock to reach the maximum height.
(b)
Answer to Problem 20P
The time required by the rock to reach the maximum height is
Explanation of Solution
Write the equation of motion.
Here,
Conclusion:
Substitute
The time required by the rock to reach the maximum height is
(c)
The place where the rock lands.
(c)
Answer to Problem 20P
The place where the rock lands is
Explanation of Solution
Write the equation of motion.
Here,
Conclusion:
Substitute
Total time taken to reach ground is
Therefore the total horizontal displacement is,
Substitute
The place where the rock lands is
(d)
The time at which the rock lands.
(d)
Answer to Problem 20P
The time at which the rock lands is
Explanation of Solution
Write the equation of motion.
Here,
Conclusion:
Substitute
Total time taken to reach ground is
The time at which the rock lands is
(e)
The velocity of the rock just before it lands.
(e)
Answer to Problem 20P
The magnitude of the velocity
Explanation of Solution
Write the equation of motion.
Here,
Conclusion:
Substitute
And the velocity along
The magnitude of the velocity,
Write the direction will then be,
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Chapter 4 Solutions
College Physics, Volume 1
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