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In an imaginary atmosphere, the air exerts a small force F on any particle in the direction of the particle’s motion. A particle of mass m projected upward takes a time t1 in reaching the maximum height and t2 in the return journey to the original point. Then

In an imaginary atmosphere, the air exerts a small force F on any particle in the direction of the particle’s
motion. A particle of mass m projected upward takes a time t1
in reaching the maximum height and t2
in the
return journey to the original point. Then

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1 Answers

Vikas TU
14149 Points
3 years ago
In this imaginary atmosphere force due to air is in the motion of the body so it will support the motion.
When a particle moves upwards the force of air supports it in upward direction but gravitational pull oppose its motion and act downwards. Now when the particle moves downwards force of air as well as gravitational pull supports it so the time taken by the particle in this case will be less (as both the forces supporting particle to move downwards, its velocity increases) than the time taken by the particle to move upwards. So,
 t1>t2

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