Question
Fri June 22, 2012 By:
 

what is the acceleration of a person in a lift? is it equal to that of lift or not?

Expert Reply
Fri June 22, 2012
For a lift moving upwards let the acceleration of the lift be a 
 
thus for a person, the acceleration  is (a+g)
here g is the gravitational acceleration
 this can be felt as if we go up in a lift we feel as if we are pressed downwards
this is due to the fact that apart from gravity, we have an acceleration a acting on us.
 
For a lift moving downwards it is quite the opposite.
we feel that we have lesser weight as our acceleration at that time is (g-a)
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