question_answer

A boy whose mass is 50kg stands on a spring balance inside a lift. The lift starts to ascent with an acceleration of \[2m{{s}^{-2}}.\] The reading of the machine or balance \[(g=10\,m{{s}^{-2}})\]is [Kerala PET 2002]

A)             \[50\,kg\]         

B)             Zero

C)             \[49\,kg\]         

D)             \[60\,kg\]