The Bessler Wheel, mystery solved.

[MarkE]

If I am right,  falling masses actually lose weight whereas a mass accelerating upwards gains weight.  This is the reason why you feel that your body has become lighter when moving down in a lift and feel heavier while moving upwards. 

When you move down in a lift, your weight will  be  'mg-ma'  and when you move up your weight will be  'mg+ma'.   Where  'a'   is acceleration of the lift.

correct me if I am wrong.

Your weight does not change in a lift.  Neither does a skydiver's weight doesn't change as they fall even when they reach terminal velocity.  In order to accelerate something upward, additional force over and above that required to counter gravity must be applied: elevator up. In order to accelerate something downward the force opposing gravity must be reduced: elevator down or a jump off a tall building.  Your body senses movement of fluids under force of acceleration in your gut and your inner ear.

[camelherder49]

What scientific principle is used and what type apparatus is used to weigh
a skydiver at terminal velocity?

[Newton II]

Your weight does not change in a lift.  Neither does a skydiver's weight doesn't change as they fall even when they reach terminal velocity.  In order to accelerate something upward, additional force over and above that required to counter gravity must be applied: elevator up. In order to accelerate something downward the force opposing gravity must be reduced: elevator down or a jump off a tall building.  Your body senses movement of fluids under force of acceleration in your gut and your inner ear.

Weight doesnot change in a free fall. A skydiver is a free falling mass.  When you apply force upwards or downwards,  it has to change the resultant weight because weight is also a force.

[AB Hammer]

LOL

This is more looking like a fishing trip for answers and each side  is looking to the other side for answers. Well here is your answer.

A falling weight in a wheel has no weight effect to the wheel while falling, yet the weight is still the same weight. Once it impacts, the impact force depends on if it is on the ascending side or the descending side. There can be a lot of vibration from an impact which can interrupt a gyro effect.


Alan

[MarkE]

Weight doesnot change in a free fall. A skydiver is a free falling mass.  When you apply force upwards or downwards,  it has to change the resultant weight because weight is also a force.

No, adding one force to another changes the net force.  It does not change the cause or magnitude of the first force.  A bucket of water doesn't become weightless when someone picks it up or puts it on a table.