Concept explainers
Part (a)
ToDetermine:The speed of baseball with which it would hit the ground.
Part (a)
Answer to Problem 49P
Solution:
Baseball hit the ground the ground the ground if air resistance is not present
Explanation of Solution
Given:
Mass of base baseball
Initial height of baseball from ground
Final height of baseball from ground
Initial speed of base ball
Final speed of baseball during hitting the ground
Formula Used:
Conservation of mechanical energy
Calculation:
Initial P.E
Initial K.E
Final P.E
Final K.E
Apply
Conclusion: If air resistance is ignored, then velocity of ball by which hit the ground
Part (b)
The average force of air resistance exerted on it.
Part (b)
Answer to Problem 49P
Solution:
Average force of air resistance exerted on base ball
Explanation of Solution
Given:
Mass of base baseball
Initial height of baseball from ground
Final height of baseball from ground
Initial speed of base ball
Final speed of baseball during hitting the ground
Formula Used:
Conservation of mechanical energy
Calculation:
Initial P.E
Initial K. E
Final P.E
Final K.E
Apply
Work done by friction (non-conservative force)
Work done by friction may be calculated as
S : distance travelled
Conclusion: Hence, average force of air resistance
Chapter 6 Solutions
Physics: Principles with Applications
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