Question
A man of mass M is standing in a lift accelerating down with acceleration a. If the lift starts accelerating in upward direction with acceleration a, then what will be the reading of weighing machine?
Solution
Given, mass of the man = M
Acceleration of the man standing on the lift = a m/s2 acting downwards
Acceleration of the lift = a m/s2 acting upwards
Reading of the weighing macine is given by,
R' =
i.e, R =
kg, is the reading of the weighing machine.
Acceleration of the man standing on the lift = a m/s2 acting downwards
Acceleration of the lift = a m/s2 acting upwards
Reading of the weighing macine is given by,
R' =
i.e, R =
kg, is the reading of the weighing machine. 
