3 Nov 2021
Problem 80b
Page 48
Section: Problems
Chapter 2: Describing motion: Kinematics in one dimension
Textbook ExpertVerified Tutor
3 Nov 2021
Given information
As per the given question and solution (a)
- First child bounces and covers one-and-a-half the height more than the second child.
- From (a), it is clear that distance covered by first child
Acceleration due to gravity always acts downwards, 
Step-by-step explanation
Step 1.
To determine the initial speed of first child we will use the third equation of motion,
The third equation of motion:
Where, 
is the final velocity, 
is the initial velocity, 
is the acceleration and 
is the displacement
Let the initial velocity of the first child be 
At the maximum height, velocity would be zero. 
Substitute the values and solve.
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Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922
Solutions
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Section
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