Concept explainers
(a)
The buoyant force acting on the Strato-lab balloon.
(a)
Answer to Problem 77PQ
The buoyant force acting on the Strato-lab balloon is
Explanation of Solution
The volume displaced is equal to the volume of balloon. Consider volume is spherical in shape, and volume displaced will be the volume of sphere.
Write the expression for volume displaced.
Here,
Write the expression for buoyant force.
Here,
Substitute, equation (I) in (II).
Conclusion:
Substitute,
Therefore, the buoyant force acting on the Strato-lab balloon is
(b)
The net force acting on lab.
(b)
Answer to Problem 77PQ
The net force acting on lab is
Explanation of Solution
Write the expression for total force acting on lab.
Here,
Substitute,
Here,
Conclusion:
Substitute,
Since,
Therefore, the net force acting on lab is
(c)
The mass carried by Strato-lab.
(c)
Answer to Problem 77PQ
The mass carried by Strato-lab is
Explanation of Solution
Modify equation (V) by including gravitational force due to the extra payload.
Write the expression for the mass of the extra payload.
Conclusion:
Compare equation (VI) and (VII), and substitute,
Therefore, the mass carried by Strato-lab is
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Chapter 15 Solutions
EBK PHYSICS FOR SCIENTISTS AND ENGINEER
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