Concept explainers
A ball is thrown upward with an initial velocity of 13 m/s. Using the approximate value of g = 10 m/s2, what are the magnitude and direction of the ball’s velocity:
- a. 1 second after it is thrown?
- b. 2 seconds after it is thrown?
(a)
The magnitude and direction of the velocity of the ball
Answer to Problem 7E
The velocity of the ball is
Explanation of Solution
Given Info: A ball is thrown upward with initial velocity
Write the expression for the final velocity.
Here,
Substitute
The positive sign indicates the motion is in the upward direction.
Conclusion:
Thus, the velocity of the ball is
(b)
The magnitude and direction of the velocity of the ball
Answer to Problem 7E
The velocity of the ball is
Explanation of Solution
Given Info: A ball is thrown upward with initial velocity
Write the expression for the final velocity.
Substitute
The negative sign indicates the motion is in the downward direction.
Conclusion:
Thus, the velocity of the ball is
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Chapter 3 Solutions
Physics of Everyday Phenomena
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