A 30.0-kg child starting from rest slides down a water slide with a vertical height of 10.0 m. What is the child’s speed (a) halfway down the slide’s vertical distance and (b) three-fourths of the way down? (Neglect friction.)
(a)
Answer to Problem 20E
Explanation of Solution
Given info: The speed of the child having mass
Explanation:
Formula to calculate the speed of an object while coming from a height is,
Here,
Calculate the height at the halfway down the water slide.
Here,
Substitute
Calculate the change in height.
Substitute
Calculate the speed of the child using the formula of the speed of an object while coming from a height.
Substitute
Thus, the speed of the child while coming down the halfway down the slide in vertical distance is
Conclusion:
Therefore, thus, the speed of the child while coming down the halfway down the slide in vertical distance is
(b)
Answer to Problem 20E
Explanation of Solution
Given info: The speed of the child having mass
Explanation:
Formula to calculate the speed of an object while coming from a height is,
Here,
Calculate the height at the three fourth down the water slide.
Here,
Substitute
Calculate the change in height.
Substitute
Calculate the speed of the child using the formula of the speed of an object while coming from a height.
Substitute
Thus, the speed of the child while coming down the halfway down the slide in vertical distance is
Conclusion:
Therefore, thus, the speed of the child while coming down the halfway down the slide in vertical distance is
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Chapter 4 Solutions
An Introduction to Physical Science
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