Concept explainers
(a)
To find: That why stars don’t crashes.
(a)
Explanation of Solution
Introduction:
The force of mutual gravity is providing the
The mutual attractions of stars are providing the necessary centripetal force for rotation. That’s why they don’t crashes with each other.
When two stars rotate in a circular motion, the gravitational force between the two stars is measured by
attraction between the two stars. So the stars will not hit each other.
Conclusion:
Therefore we conclude that as they are revolving with calculated speed so they don’t crash.
(b)
To find: The mass of each star.
(b)
Answer to Problem 78GP
Explanation of Solution
Given Data:
Formula Used:
Gravitational force between stars each of mass m is given by
Speed v of star related to period of revolution T,
Centripetal force acts on each star,
Putting value of v in above equation
The centripetal force acting on the star is balanced by gravitational force between two stars
Calculation:
Substituting the given values
Conclusion:
Therefore, the mass of stars are
Chapter 5 Solutions
Physics: Principles with Applications
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