JAMB - Physics (2011 - No. 1)
A man standing on a lift that is descending does not feel any weight because
the inside of the lift is air tight
the lift is in vacuum
the lift's acceleration is same as acceleration due to gravity
there is no gravitational pull on the man in the lift
Forklaring
The resultant force acting on the man is given by w = mg - R
Mg - mg = 0
The man feels weightless because the reaction, R is equal to the weight mg
Mg - mg = 0
The man feels weightless because the reaction, R is equal to the weight mg