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# If we go inside a mine and drop a $104\,lb$ iron ball and $1\,lb$ aluminium ball from the top of a high platform, neglecting air resistance.A. Both will reach the floor at the same timeB. $1\,lb$ weight will reach the floor firstC. $10\,lb$ weight will reach the floor firstD. It is not possible to indicate which of the two will reach the floor first without further data

Last updated date: 20th Jun 2024
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Hint:Here we have to apply the concept of acceleration due to gravity and air resistance. Air resistance is a force caused by air. Resistance behaves in the opposite direction to an object travelling through the air. Air resistance, also known as drag, is a force created by air, which moves in the opposite direction of an object passing through the air. It's where the air particles reach the front of the object, slowing it down.

Acceleration due to gravity is the acceleration of the mass due to gravitational force. Its unit for SI is $m{s^{ - 2}}$. It has both magnitude and direction, since it's a vector quantity. Acceleration is expressed by $g$ due to gravity. The normal value of g at sea level on the surface of the planet is $9.8\,m{s^{ - 2}}$.
If we go inside a mine and drop a $104\,lb$ iron ball and $1\,lb$ aluminium ball from the top of a high platform both will reach the floor at the same time. It's because the gravitational acceleration is constant on all objects independent of the mass, neglecting the resistance of the air. The acceleration is constant on all objects.